Well, that was fun.
I was going to ride from Rochester to Crawley following the Medway, crossing it as often as possible. But Easter train engineering works put paid to that.
So instead a nice Kent ride, round my usual haunts. Weather varying from misty to dreich to quite nice. Near the end I was going up Chalkpit Lane, a particularly nasty hill (I'd guess 15% +). Just as I hit the steep bit before the hairpin I stood on the pedals. After a couple of pedal revs BANG the chain slipped and I was all over the road. A bit bruised but otherwise OK. I dusted myself down and pushed for a bit while I calmed down, then remounted and continued - seated this time. And it slipped again. This left me very nervous in traffic, afraid that the chain might slip when I accelerated into a junction or something. I'm not sure if it's the chain or the cassette or (I suspect) the freehub. I'll be doing some checks and starting a thread in the technical know how section.
I suspect that the real underlying cause will be that Modern Bikes Are All Rubbish and they were much better in the 80s.
Anyway, that aside, a good start to April.