In article , Edward Martin
writes

Any suggestions how I can bring it back to life and revive the greenness and
deal with the 'bald' patches ?

We've looked after our lawn for many years without ever using either
fertilisers or weed-killers. It stayed lush and green all winter, then
it responded magnificently to its first cut of the season last week.

Your lawn grass will recover quite soon if you let it. Mow it regularly
at a consistent height, other than that let it do its own thing.
--
Alan & Joan Gould - North Lincs.