I’ve been looking for some 3/4 non bib tights with a bit of insulation to be used for commuting over the colder seasons but there doesn’t seem to be much about at all.

Ideally I’d like relatively cheap as well, say up to £50 if possible.

Anyone got any recommendations?

You can’t expect much with an RRP of £50.

I’m really pleased with my dhb Aeron Roubaix 3/4 shorts, and did get them for about £55 from Wiggle a few years ago, but they now seem to cost more.

Have a look for something from Lusso. I’ve had really good experiences with their shorts/leggings over recent years, and despite being made in the UK, their stuff is really good value. They do a 3/4 version of their excellent Carbon shorts:

http://www.rushcycles.co.uk/m48b167s541p4929/LUSSO-Carbon-Roubaix-3-4-Bib-tights-with-antibacterial-carbon-insert/RS_GB/12024

SportPursuit have Bioracer stuff in at the moment.
I have a few Bioracer/Stolen Goat tops/jackets so far, and find they fit really well and are well made.
They have a pair of 3/4 length tights for £37.99 Bibtights

Also like the Wiggle Aeron 3/4, but tend not to use so much now.