Thanks everyone, really appreciate it. I think the outside is in quite good condition especially the roof as i remember it being painted a while ago. Will have a proper look though. I'm not able to give the symptoms of it not starting at the moment but I'll be having a look at it on Sunday so might be able to update then.
Thanks Chris, my knowledge of anything mechanical is pretty limited and i only know a couple of mechanics through people and can only get to it at weekends, unfortunately I need to find somewhere new to keep it pretty soon so any help getting it running would be much appreciated.
Colin that may be what is happening as i remember my dad saying that he thought it might be a blockage and had bought a kind of fuel lubricant (excuse my ignorance not sure what it actually is and don't have it with me right now) that he planned on using as the next solution. It is a petrol yes.