whilst it looks vintage it isn't I'm afraid. it's a modern bike, was still being sold last year but stock now appears to have dried up. Avocet own the name, they import acceptable quality bikes (one of mine is from them) and sell them through a parkers of bolton and local bike shops. or did. they've had some money issues and cut back their line up after gaining support another company (Want to say a Swedish company) they own a number of brands, this include insync, viking, coyote, Riddick and a few others.
they are located in Salford.
As to this bike. it's a 400 quid bike that was reduced almost everywhere to 200, the gear shifters are nasty but function, the wheels are heavy and it's a freewheel hub which is a bit pants. is it a top of the line racing bike? nope, is it enough to get out on and just enjoy? yer it is, it's functional. replace bits as they wear out, keep on top of maintenance and you'll be fine. I'd be really tempted to chuck a Chinese produced group set on it and enjoy.
(side note, my avocet is a Coyote and it's done many many happy miles and a few unhappy ones too).
https://ctbikes.co.uk/the-shop/road...ubmaster-gents-road-bike-59cm-frame-700c-red/