Turf rescue!

[123rd]

We had some new turf laid in Aug. Watered it loads. Let it bed in for ages before cutting it.
Just recently some of the turf looks like it's dying off.
Shall I watered it lots to try and revive it? Try to feed it?
I'm very clueless

Sounds like you have been cutting it too short. Let it recover during the winter. Raise the blade in the spring.

It could do with a water I think - we've had drizzle here a few times lately, but no real soaking downpours for weeks. If it's been dryish like that where you are, then it's water it needs. Feeding isn't recommended for plants that haven't established, so maybe wait until spring for that.