I never hear warnings not to cut trees/hedgerows in nesting season - I'm going to email RSPB ...

Since we have Red Kites, cats prefer to stay inside and go only out at night when birds sleep on their trees.

 

“.., Currently, farmers and landowners are prevented from trimming hedges during six months, between 1 March and 1 September to protect nesting birds as part of EU legislation…”
Hedgecutting ban: One rule for farmers, one for councils? - Farmers Weekly
I understand that these rules have been carried over post Brexit.

For gardeners the law prohibits disturbing nesting birds.

 

I think this rule is not well known. In fact I didn’t know it applied to everyone, although it definitely does to farmers.