I'm also signed up for this
A quick public service announcement for those coming from London, return tickets to Didcot Parkway are currently £25 and there are still bike spaces available... unless I took the last ones!
I've booked the 5:17am train from Paddington to Didcot which gets in at 6:07am. Then it's a gentle 13 mile ride from Didcot to Sparsholt in time for a 7:30am start.
More tricky is the return journey since GWR have a mandatory cycle reservation policy and reservations can only be made up to 2 hours before departure.
I've booked on the 7:30pm train (arr. London 8:15pm) assuming a 10 hour 200, 1 hour return to Didcot, and 1 hour contingency. But I'll have the GWR number to hand and if everything goes completely foxtrot oscar the 4 hour ride from Didcot to London is very pretty and usually wind-assisted.