Took it steady on the commute home tonight. Got a flat on the road to Murder-hell. Fixed it in good time, but the tyre lifted out of the rim, so I let some pressure out to prevent a blow out, but best to go slow in those circumstances. Decided that cleaning the cassette, chain and derailleurs was also a good idea whilst I fixed the flat. That was my evening, beats Corry!! The route planning for the weekend rides will have to wait while tomorrow evening now.