I use a basic gel superglue. I like gel because it's easier to control, doubles as a filler and (in my experience) will hold the part quicker, so you're not standing there like an idiot holding 2 parts together for 20 minutes. I've never been super picky about the brand, and I dunno what's available in the UK but, if you can find some, I highly recommend the new-ish style bottles that you squeeze on the sides, like so:
The increased level of flow control is phenomenal.