In reply to MHutch:
> Both eight - so getting a bit more leg power, but still with the odd wobble, and not really up to anything which requires any technical ability.
Grizedale would be OK if you stick to forest roads. The North Face Trail is good fun and not hard as red trails go but is reasonably knobbly the whole way and has some tricky north shore to deal with, as well as some small drop offs.
There's a really good, mostly easy loop over Claife Heights not too far from Grizedale - coming back along the shore of Windermere. There are a couple of very short technical sections but they're easy to push past and the rest is really nice.