Hi, thank you all for commenting.
The trees were a mix of Hazel, sycamore and ash I think ( not fir trees ) and were quite full and very established ( rural location of that makes any difference?) .
The communication was all verbal including pointing to a growth spurt area about 3.6m up as the cut off point. So was quite clear.
There was a time lag between us talking about it, and them doing it, to be fair, ( due to weather and other jobs between ours) but the beech hedge boundary that comes off it at one end is established at about 2.5m, as is the boundary at the other side. They even built us a new fence and security gate last summer on the opposite boundary so they know security is a big thing for us.
I am amazed they didn't just match it to the other boundary's if they were going lower than the agreed point.
Re what to do now: if we put in a proper fixed fence, it will need to be infront of the 1m bunch of stumps/folded over bows, as no room to dig in behind, as will all be roots. If we screwed a hurdle fence to the rear, at the rear, and the wind blows it over it would be into land not owned by us, so we'd be liable for damage to cars parked there. So that's not practical to do.
So could only fix on our garden side , but I'm then worried we might lose that land, our boundary goes to the rear of the trees, but if we fence off on this side, what's to stop people thinking that's a new boundary .
Although I've looked at hurdle fence panels this morning ( online) as was suggested fixing them to the stumps. £74 a fence panel ! Ouch !
I've also looked at a privacy netting ( ugly!) .
The panel trees are lovely but also pricy .
They tree guy said it will double in height in about a year. ( so maybe my face was readable ) and will be denser than before . But I just can't get past the security thing.
We a rural and sadly there are some people who help themselves to oil or garden equipment, one neighbour even had old oil barrels lifted from their garden ( for scrap values I assume )
As we didn't go abroad last year and won't be this year, we were looking forward to buying new rattan sun loungers and an extra long table with 10 new chairs and making an outdoor bar /kitchen etc.
I don't feel we can risk that as it might well go walkabout.
First world problem I know. I should just be patient. And hope it grows fast.
Thanks for your support 