Not entirely sure if this is the right place to post this but...
As per thread title, this event takes place on the first Wednesday of every month in Earls Barton just outside Northampton. It's more cars than bikes, but there are usually quite a few bikes to look at (and owners to chat to). It's well worth a look. the last time I went there was something like 500 cars in attendance and dozens of bikes.
£3 to get in (per vehicle, not per person).
https://www.classiccarmeet.co.uk/mee...-and-bike-meet