Hi Mags
I would be interested in walking the parks but I'm not around much until September. I have done an enjoyable walk starting at Camden lock then up the hill to Primrose hill, great views over London, then down the hill to Regents Park and along the canal to Little Venice then Paddington Lock.
I would be interested in a walk out at the new Olympic site I don't know if one exists.
I'll keep an eye on this thread and perhaps something could be organised in the autumn
Scholesy