This is James Du Boulay's second marriage. He was formerly married to Dr. Alexis Crow, Ph.D. International Relations LSE, and formerly with Chatham House until 2012 (or still with them in 2013).
[picture - James Du Boulay aged 37 at his half-brother Henry Lowson's wedding. The earlier picture 2001 was at his half-siblings' birthday party 2001]
James Houssemayne Du Boulay (b 1972) was previously married circa April 30, 2011 (the day after Prince William and Kate Middleton's wedding) to Alexis Crow (b ca 197__), daughter of Robert Crow Sr, of Corpus Christie and Mrs Hollis Groppe Crow, of Houston, Texas. She was an old college friend of the Cambridges. Their April 30 wedding made the news slightly, because some of their uni friends were invited to both weddings and had to turn down the transatlantic wedding for the Royal Wedding. Not sure what happened, presumably a divorce.
Dr Crow held a Ph.D. in International Relations by 2011, and her profile reminds me slightly of Vanessa Neumann, formerly married to Bill Cash IIRC.
What I found
"The engagement is announced between James, eldest son of Mr Robin Houssemayne Du Boulay, of Lacock, Wiltshire, and Lady Lowson, of London, and Alexis, daughter of Mr Robert Crow, Sr, of Corpus Christi, Texas, and Mrs Hollis Groppe Crow, of Houston, Texas."
The former Mrs James Du Boulay apparently attended St Andrews with William and Kate who sent a personal message to the bride on her wedding day
"The fact that Miss Crow, a good friend of Wills and Kate from St Andrews, is getting married in Texas the next day has presented guests invited to both with a social minefield.
Miss Crow, a researcher at think-tank Chatham House, has invited all her pals from St Andrews to her wedding, but has had to accept it when the handful who have been invited to the royal nuptials turned her invitation down.
Alexis will marry banker James Du Boulay at 7.30pm on April 30 in Texas, where her family live.
Speaking from her home in Chelsea, the groom’s mother, Lady Lowson, was a little more expansive. She said: ‘Alexis has accepted that quite a few of her friends wouldn’t travel to Texas when they could go to a historic wedding here. Obviously they have quite a few mutual friends.
'Having said that, at least two people are going to both. They will go to the Royal Wedding and then fly through the night to get to Texas
‘I don’t think Alexis is upset, we’re all rather amused at the clash more than anything, although I’m sure it has caused difficulties for the mutual friends.’
She added: ‘The parents are charming. I forgot to ask them what they do.’
In fact, Alexis’s parents, Robert and Hollis Crow are extremely wealthy Texans. They made a fortune in the oil industry — so rich are they that their ranch houses elephants and zebra to amuse guests.
Alexis Crow was a researcher at Chatham House in 2011.
Hope this helps.
James Du Boulay's distant kinsman Suzanne Du Boulay married a Gordon of the marquesses of Huntly, and her daughter Jane Gordon is wife of Lord Robert Mercer-Nairne, whose two sons have married and fathered sons (unlike the sons of the present marquess of Lansdowne whose younger son has married but has daughters only).