I know a place in cornwall. no use to you but a reference. they do a refillable bottle you buy for £45 plus vat. about the size of a pub gas bottle. 7kgs and £7 per refill.
Closer to you sealey do a 1kg refillable for about £30 plus 10 per refill.
found one eventually, 50 plus vat and 6.50 fill, sealet want postage to return it after fill, they pick it up from a dealers free and want 7 quid to send it back so works out at 17 quid, got the bottle from fox gas supplies at newton aycliffe
Sorry To Butt In Chaps But Im Not Very Good On This Confuser Thingand If I Push Any More Buttons Iwill Probably Lose The Site What I Wanted To Know Kernocam Was Where I Can Get These Gas Bottles In Kernow Im On The Small Throw Away Ones Which Are A Rip Off Also Im In Desperate Need Of A Cebora Parts Dealer In Cornwall Me Fan Has Just Burnt Out . Thanks And Sorry Andy