I'm paying £40 an hour for my sessions at eversley (plus £10 for the video which I don't think is worth it - take your own equipment!). From my one session so far I was impressed, getting good simple advice of little tweaks, and things I can work on myself and how to spot myself the things I'm doing wrong, though it's the first time I've had 1-1 coaching so nothing to compare it with.... next one coming up this afternoon.
I suspect they're probably pretty busy weekends and evenings now so don't know whether you'd get any sessions then, however if you're lucky enough to be able to do them weekdays during the day they had plenty of spare slots.
Oh... and as for working on your keeping, Michael Bates (ex hants) was coaching in the net next to me, I was quite star-struck