Question: When was the British financial analyst to whom Sophie Winkleman was a wife born? 

Context paragraphs:
ElvenQuest: ElvenQuest is a comic fantasy broadcast on BBC Radio 4 by Anil Gupta and Richard Pinto, and starring Stephen Mangan, Alistair McGowan, Darren Boyd, Kevin Eldon, Sophie Winkleman and Dave Lamb.  The series takes place in the world of Lower Earth, a parody of Middle-earth from "The Lord of the Rings" by J. R. R. Tolkien.  In Lower Earth, a band of warriors go forth to search for a mythical sword to save Lower Earth from the evil Lord Darkness (played by McGowan).  In order to do so, they must find "The Chosen One" who will save Lower Earth.  The Chosen One is Amis, a dog in the real world which belongs to a fantasy novelist called Sam Porter (played by Mangan).  The first series was broadcast from 29 March to 3 June 2009 and the second from 18 November 2010.  The third series began broadcasting from 17 October 2011.  The fourth series began broadcasting 12 February 2013.

Financial analyst: A financial analyst, securities analyst, research analyst, equity analyst, investment analyst, or rating analyst is a person who performs financial analysis for external or internal financial clients as a core part of the job.

Global Analyst Research Settlements: The Global Analyst Research Settlement was an enforcement agreement reached in the United States on April 28, 2003, between the United States Securities and Exchange Commission (SEC), Financial Industry Regulatory Authority (NASD), New York Stock Exchange (NYSE), and ten of the United States's largest investment firms to address issues of conflict of interest within their businesses in relation to recommendations made by financial analyst departments of those firms.

Industry analyst: An industry analyst performs primary and secondary market research within an industry such as information technology, consulting or insurance.  Analysts assess sector trends, create segment taxonomies, size markets, prepare forecasts, and develop industry models.  Industry analysts usually work for research and advisory services firms, and some analysts also perform advisory (consulting) services.  Typically, analysts specialize in a single segment or sub-segment, researching the broad development of the market rather than focusing on specific publicly traded companies, equities, investments, or associated financial opportunities as a financial analyst might.

Lord Frederick Windsor: Lord Frederick Windsor (Frederick Michael George David Louis; born 6 April 1979), also nicknamed Freddie Windsor, is a British financial analyst, and the only son of Prince and Princess Michael of Kent.

Raymond Goldie: Dr. Raymond Goldie is a New Zealand-born financial analyst, author and media commentator in Toronto, Canada who is currently an independent analyst.  Previously, he was a Senior Vice President and Senior Research Analyst at Salman Partners.  He is a regular on the Business News Network (BNN) and is the author of Inco Comes to Labrador.

Sophie Winkleman: Sophie Lara Winkleman (born 5 August 1980) is an English actress.  As the wife of Lord Frederick Windsor, son of Queen Elizabeth II's first cousin Prince Michael of Kent, she is formally referred to as Lady Frederick Windsor, but continues to use her maiden name in her professional career.

Vinay Varma: Vinay Varma is a theater artist, actor, casting director, Author, Researcher, Economic Analyst, Global Economic Adviser, Financial Analyst, Financial Planner.  from Satna MP, India.

Abena Brigidi: Abena B. Brigidi (Mrs.) is a Ghanaian investment analyst author and speaker.  She is a certified financial analyst and a thoroughly bred banker with over a decade in the financial Industry.  Abena is married to legal practitioner David Cobbina Brigidi.

Resampled efficient frontier: In investment portfolio construction, an investor or analyst is faced with determining which asset classes, such as domestic fixed income, domestic equity, foreign fixed income, and foreign equity, to invest in and what proportion of the total portfolio should be of each asset class.  Harry Markowitz (1959) first described a method for constructing a portfolio with optimal risk/return characteristics.  His portfolio optimization method finds the minimum risk portfolio with a given expected return.  Because the Markowitz or Mean-Variance Efficient Portfolio is calculated from the sample mean and covariance, which are likely different from the population mean and covariance, the resulting investment portfolio may allocate too much weight to assets with better estimated than true risk/return characteristics.  To account for the uncertainty of the sample estimates, a financial analyst can create many alternative efficient frontiers based on resampled versions of the data.  Each resampled dataset will result in a different set of Markowitz efficient portfolios.  These efficient frontiers of portfolios can then averaged to create a resampled efficient frontier.  The appropriate compromise between the investor's Risk aversion and desired return will then guide the financial analyst to choose a portfolio from the set of resampled efficient frontier portfolios.  Since such a portfolio is different from the Markowitz efficient portfolio it will have suboptimal risk/return characteristics with respect to the sample mean and covariance, but optimal characteristics when averaged over the many possible values of the unknown true mean and covariance.  (Michaud, 1998) Resampled Efficiency is covered by U. S. patent #6,003,018, patent pending worldwide.  New Frontier Advisors, LLC, has exclusive worldwide licensing rights.

Supporting paragraphs: Sophie Winkleman Lord Frederick Windsor
Answer: 6 April 1979