Silverline 45cc Petrol Chainsaw £69.72 (was £139.44) delivered, Amazon UK. Other half-price tools available
Okay so it's a cheap-and-cheerful make, but probably won't find a cheaper petrol chainsaw.
Too dangerous for me, but might be useful for someone!
42cc Petrol driven chainsaw. supplied with Carlton chain & Walbro carburettor. Features mechanical and inertia activated chain break. Bar length 455mm, max lutting length 450mm. Automatic oiling system. conforms to ES ISO11681- 1:2004.
Amazon seem to have a lot of Silverline tools at "Half-price", RRP price probably needs to be taken with a pinch of salt TBH.