Thanks everyone, and certainly interesting to know about the carb heater! There is indeed a tap underneath the tank. The bike has a nice patina about it, which I like.
I think someone has painted the tank at some point and probably those rubbers too sadly, I found some online, just need to decide whether I want them badly enough to pay 20 quid each
The use of cable ties extends to one holding the back seat on I think, I will find that in due course I'm sure.
Just needs a service, new back tyre (it's got a 2010 date stamp), a couple of float bowl gaskets, maybe a fork rebuild over the winter and I'm good to go, oh and I need that license obvs...