Thanks for the advice. There's a bike shop in Leamington Spa, a town we used to live in and frequently shop in, which stocks Pashley bikes. I think I'll go there and investigate options.

abrinsky has a bike, but it has been stored in the garage untouched for a decade. I'll have a chat with him about whether he's interested in getting it out and having it serviced, so that we can cycle together. I'm very nervous about the whole prospect, so his company would be reassuring to start with.