About us


Winterflood Securities is a market maker offering execution services to retail brokers and institutional clients. We are committed to making two-way prices even in extreme adverse market conditions. It is our belief that technology led innovation is a solid path to the development of our company. We, at Winterflood Securities pride ourselves on being client-centric and aim to provide our customers with a flexible, high quality service throughout the entire execution cycle from pre-trade right through to settlement.

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Philip Yarrow FCA MCSI

Philip Yarrow FCA MCSI
Chief Executive Officer

Philip qualified as a Chartered Accountant with Coopers & Lybrand, specialising in Financial Services. He joined Dresdner Kleinwort Benson in 1997 and was responsible for business development of electronic trading within the Global Equities Division. He joined Winterflood Securities in 2000 as Head of Electronic Trading and became a Director in 2002. He was appointed Chief Executive Officer in 2015.

Bradley Dyer

Bradley Dyer
Director & Head of Trading

Bradley worked at both James Capel & HSBC in the late eighties and later joined WestLB Panmure and WestLB Equity Capital Markets in 1997. He was mainly based at WestLB Panmure in London but also spent time in both New York & Dusseldorf office locations trading European & US Equities as an Executive Director.

He joined Winterflood Securities in 2004 as a Senior Dealer. He was appointed to the role of Associate Director in 2014 and later appointed to the Board as Director of FTSE 350 & International Trading in 2017 overseeing Institutional & Retail FTSE 350, Pan European & US Domestic Equity Markets.

In 2018, Bradley was appointed to Director & Head of Trading, with overall responsibility for trading across all sectors.

Matt Wilkinson

Matt Wilkinson
Director & Deputy Head of Trading

Matt Wilkinson joined Winterflood Securities as a Corporate Actions Clerk in 1997. Matt later became a Small Cap Dealer in 2001 before becoming a Senior Dealer for AIM in 2005. He was later appointed to the role of Associate Director in 2014 and became Head of AIM in 2018.
In 2019, Matt was appointed to Director & Deputy Head of Trading.

Alex Skrine BA (Hons) MCSI

Alex Skrine BA (Hons) MCSI
Director of Electronic Trading

After completing his degree in Economics, Alex  joined Winterflood Securities in 1999 as a Settlements Clerk. After working in various back office and operational roles, he joined the Electronic Trading desk shortly after it was formed in 2000. Having served as Head of Product for E-Trading since 2010, he was appointed to the role of Associate Director in January 2014, and subsequently became a Director in August 2015.

Joe Winkley

Joe Winkley
Director & Head of Investment Trusts

Joe Winkley became a Director & Head of Investment Trusts at Winterflood Securities in September 2018. He joined the firm in 2013 as the Head of Corporate Finance to advise 54 investment companies and was responsible for all listed fund transactions including IPOs, issuance and corporate advisory. Joe has nearly 20 years’ experience in investment funds and has advised on over £10bn of fundraising. Joe previously worked at Oriel, UBS, Dresdner Kleinwort, and Slaughter and May, where he qualified as a solicitor.


Simon Rafferty FCA MCSI

Simon Rafferty FCA MCSI
Chief Operating Officer

Simon qualified as a Chartered Accountant in 1997. In 1998, he joined Deloitte LLP to work in the Financial Services practice. He joined the finance team at Winterflood Securities in 2000 and in 2003 he became Financial Controller and Company Secretary. Then he was appointed to Head of Compliance in 2005 and was promoted to Director in 2012.

Grant Davidson MBA

Grant Davidson MBA
Director of IT

Grant joined Winterflood Securities in 2004 having previously worked as a specialist IT consultant within both financial and legal businesses in London.  During this time, he completed an MBA in 2008 which has allowed him to better align the IT strategy to the overall business plan.  In 2010 he was promoted to oversee the IT function.  He was later promoted to an Associate Director in January 2014 and then to the board as a Director in August 2015.

Alex Kerry

Alex Kerry
Director & Head of Winterflood Business Services

Alex has over 20 years’ experience working in Financial Services leadership roles across a number of sectors including Treasury, Wholesale and Wealth Management. Alex joined Winterflood Securities in 2010 where he was instrumental in establishing Winterflood Business Services, becoming the Head of WBS in 2014. Prior to that he worked for Barclays Wealth optimising the operations area and control functions of the businesses in London initially, then the Channel Islands, Cyprus, Gibraltar and the Cayman Islands. Alex previously worked at Citigroup working on new Client Implementations and Motorola Inc in Corporate Treasury. Alex was appointed to the board as a Director in 2019.


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Formed in 1988
  • The company is formed in 1988 with 37 staff from County Natwest
1993 Bought by Close Brothers
  • Winterflood is bought by Close Brothers plc
1994 Fixed Income desk launched
  • Fixed Income desk is launched with GEMM Status
1995 Winterflood Securities starts trading in AIM stocks (60 staff)
  • Winterflood Securities starts trading in AIM stocks (60 staff)
1997 Launch of BESTWINS automatic execution system
  • BESTWINS automatic execution system is launched
1999 New trading desk covering European and North American listed stocks
  • The trading desk covering European and North American listed stocks is set up
  • Electronic trading team is set up and Winner launched
  • Fixed Income platform, Bondscape, is first launched
  • FTSE 100 trading desk starts
  • HSBC Investment Trust team joins Winterflood Securities
  • Winterflood joins OFEX as a market maker. OFEX became Plus Markets in the same year and was acquired by ICAP in 2012 and renamed ISDX
  • The company is the only market maker registered in all SETSmm small caps
  • Winterflood Securities now makes markets in all UK quoted ETF’s
  • Winterflood acquires a trading system company, allowing our electronic trading team to deploy customised trading solutions for some clients.
  • The Electronic trading team launches DMA to Exchanges and MTF’s via SOR
  • Winterflood offers access to the leading Dark Pools
  • Winterflood Business Services is established as separate division
  • Winterflood Securities is rebranded
  • On 5th August Winterflood breaks its own record by executing 140,000 trades in a single day
  • Winterflood becomes member of Nasdaq OMX
  • Winterflood becomes a market maker on Equiduct
  • Fixed Income team is now a market maker on ORB
  • 25th Anniversary at the London Stock Exchange
  • Winterflood Investment Trusts team executes the largest investment trust IPO in history, raising £800m for the Woodford Patient Capital Trust.
  • Winterflood Business Services launches a fractional ETF dealing facility allowing platforms, robo-advisers, and discretionary fund managers to offer trading and custody of ETFs on a fractional share basis. This will allow greater access to such products and will enable fully invested positions to be achieved at cheaper rates to the end-client.
  • Winterflood Securities celebrates 30th Anniversary


  1. 1988
  2. 1993
  3. 1994
  4. 1995
  5. 1997
  6. 1999
  7. 2000
  8. 2001
  9. 2002
  10. 2004
  11. 2005
  12. 2006
  13. 2007
  14. 2008
  15. 2009
  16. 2010
  17. 2011
  18. 2012
  19. 2013
  20. 2015
  21. 2017
  22. 2018

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Close Brothers is a leading UK merchant banking group providing lending, deposit taking, wealth management services and securities trading.

Our Banking division provides lending to small businesses and individuals, with an emphasis on specialist finance. We also offer deposit taking services to UK businesses and individuals.

In Securities, we provide trading services in the UK through Winterflood, a leading market-maker.

Close Brothers Asset Management provides a range of financial advice, investment management and on-line investing services, helping clients to secure their financial future.

Established in 1878, we believe our traditional merchant banking values, based on service and integrity, continue to be relevant today. We define our approach to business as ‘modern merchant banking’ - values that are embedded in our culture and that underpin everything we do.

Today, Close Brothers Group plc employs around 3,300 people, principally in the UK. We are listed on the London Stock Exchange and are a constituent of the FTSE 250 index. 


Close Brothers Modern Merchant Banking

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