Found this wee torch heater in my local tesco's not sure how good it is but im very tempted to get one.
This Tesco stainless steel garden torch creates a warm atmosphere in your garden. The garden torch has a 1.1kw output and can be placed on the ground or on a table. This gas powered garden torch is suitable for use by ages 18 years+. This garden torch doesn't include gas container. Gas canister required: Butane Battery Gas Cartridge A4 (Code: BS 0130)