Did my first Sportive yesterday, the Bay Dash from Lancaster. It was 110km and 1100 metres ascent of wet and wind (a magic headwind that knew to change when we headed back towards home) and despite the 100km around Cheshire the day before, i felt ok. Actually that's not true, i felt ok until the last 10 miles and then the world and his wife came by and i was wiped out and sick of everything ever.
Enjoyed this foray into cycling proper and plan on doing a few more in the build up to a solo go at the Fred Whitton in late June. Next up after a few local long rides is the Keswick Sportive in May. I think nothing the day before might help.