I was going to suggest you get the will for Daphne, but there is only a grant,
GARCIA MARGARET DAPHNE 03 August 2010 3346194 26 March 2010 Grant only Winchester
I don’t know if you are hoping they were descended from the Gainsborough couple.
If the parents I posted before are correct, then Lionel Otway’s parents were both ANDREWS and had a common ancestor who it is quite easy to get back to. One Richard Bullock Andrews born about 1797. He was a solicitor in Epping, Essex. Died 1845. (A son by the same name went on to be a bigwig in Australia)
https://en.m.wikipedia.org/wiki/Richard_Bullock_AndrewsHaving trouble bridging the gap to The Gainsborough couple, but they are in the right area.
Richard Bullock did leave “my mother’s picture” to his brother captain Robert Andrews in the Royal Artillery. But i need to print off the will to have a hope of reading it properly.
Also the will of Robert Andrews (The Gainsborough man). Is very long.