In article , eddy
writes
Does anyone here know full details ?
types of trees ,heights, light deprivation ?

IIRC new legislation is proposed to bring the height of growing hedges
into line with constructed fences, i.e. normally a maximum of 2m./6'6".
It aimed primarily at nuisance from Leylandii hedges which are left
untrimmed, but it would also take in other hedging problems.
--
Alan & Joan Gould - North Lincs.