Petrol strimmer

Can't give recommendations for amateur strimmers but we used  Stihl  strimmers where I worked and they were very efficient at what they did. I like the heads with a large buutton in the middle that you could tap on the ground and it automatically let out a fixed length of cord.
I am a fan of Stihl stuff but it is quite expensive. Our strimers seemed to last forever though and they were used day in, day out, during the summer.

Thanks Vinny will take a look

Just had a thought. The new Stihl strimmers have dampeners fitted to keep HAV's levels down (Hand Arm Vibration), meaning you can use them for 8 hours without suffering vibration 'White finger' . A necessity for pro's but maybe not for amateur use.