Seven-thirty start from Grazeley, but left about five minutes later due to GPS loading difficulties ( I can't manage without the damn thing). Within a mile I realised that a more pressing problem was that my new chain & 1000 mile old cassette weren't on speaking terms. This was generally OK on the flat, but it made life very interesting on the hills (and I have enough trouble with those, anyway). Eventually got going, got cold, got wet, got to Hungerford, got my coat on - and the sun came out. Just short of Bratton (turning point) one of my rear spokes parted company with itself - t