I've just been re-reading Zoe Heller's Notes on a Scandal, which is a dark and satirical comedy of manners, and made an excellent film. But how the technology has moved on. The two illicit lovers are making surreptitious calls on landlines (tho' the boyfriend does have a "pager" - cripes, had forgotten about them). The heroine, Sheba, looks for call boxes. It was published in 2003 and technologically it sounds as dated as the suppressed letters of Victorian novels.
I am glad to say that Sheba travels to assignations on her bicycle - though that seems part of her daffy artiness.
Also - happy pedantry. "We took a taxi from Edinburgh to Peebles. This was an extravagant thing to do, but Sheba said that the train would be too slow." Gotcha, Heller.