Glue for front screen

I have a replacement LCD/digitizer/screen assembly for my Oneplus X, but it has come with no adhesive. There is no adhesive left on the phone.

I haven’t been able to find an adhesive “template” for the phone, so as a result I’ve been reading about various glues… and I’m now, “stuck,” pardon the pun. Conversations about glue leaking between LCD and glass, and all sorts of other horrors. No firm idea how to go forward.

I’m in the UK so have been purchasing from the EU shop, where E6000 apparently isn’t sold.