Yes it can get addictive but it can also be frustrating, a lot of members on here seem to collect HW's or BSA's which there seems to be a lot of about, so not so difficult to obtain certain models, the problem arises when you want a particular make or model which they only made in small quantities in the first place, that's when you get obsessed with perusing every site on the internet hoping to find the rifle you're after.
The problem we have around our area (I live near Southampton as well) is the lack of decent gun shops with lashings of secondhand air rifles, the only good place being Protek which have decent choice but not always what you want but they are still 40 miles away.
Pete