Routeing on the way back is actually easier, as you'd be GD - WOTAN - CPT then no doubt descended and passed to Farnborough for the inbound leg to Fairoaks,
However - what are you flying? Standard joining level at WOTAN is level at FL90 (not climbing to, due to Bristol/Filton inbounds being at FL80 by WOTAN) and if you're a slow climber (and in these circumstances 1000fpm is slow) then you're going to get in the way of other, faster traffic unless you get vectored a long way out of the way to gain the height.