Thanks for the comments, guys. Sounds like they work well, but if the battery needs charging after 10 metres then it will have to be petrol, as l have at least five times that much hedge, unfortunately. The laurel section is very tall for which I need a long reach trimmer. I agree with the Stihl comments, but their cheapest long reach model is well over £500! I’ll have another think about it.
Thanks again for the constructive comments.