Hello, I am new to this forum & a novice gardener, but would appreciate some advice for my dying tree!
I have a young silver birch that appears to be dying.
It is in a UK city garden, approx 8feet high and is in between a very young maple and a young hornbeam, both of which are fine.
We planted it when it was about 5 feet high and for the last few years it has grown very well, but this year the leaves are very small and sickly and over the last few weeks, 80% of them have gone crispy brown. The rest are small but still green. The bark has an orange/brown tinge.
I am watering it regularly and have given some plant feed.
I was looking on the web and one suggestion might be 'bronze borer'? Or is that not found in the UK?
Another said that a late frost in Spring might have damaged the leaf buds, but I can't recall any heavy frost.

I would appreciate any help! Thankyou