Ryobi One+ pole saw here. Considerably cheaper than £300 and yet to run out a 5Ah battery before I've finished / got bored.
Great bit of kit and easily takes off 4 or 5" branches without even breaking sweat. Problem when you get to that size is not getting taken out when they fall! Got the chainsaw too and that's also brilliant. Much easier then faffing around with extension leads. Been there and done that and its a pain!
£60 for the cheapest corded in Screwfix, I paid £100 ish, next day delivered for the Ryobi.