I have 4 single train tickets.
2 Adults, London Euston - Nuneaton. Depart 10:46 - 12:16 on 12th May
2 Adults, Coventry - London Euston. Depart 12:31 - 13:37 on 13th May
Outward Journey - 2 for £17
Return Journey - 2 for £17
All four = £35 or nearest offer
I work in London and live near Kingston so can work around that to get you the tickets.