Does anyone know anything about gardening?

It's just bindweed. Very vigorous and tricky to get rid of entirely as the roots spread far and wide, but not anything awful. I'd be more worried about the yellow crocs.

Can't see properly on screen. But it looks like one of the types of bindweed? They spread underground rhizomes and are a bit of a sod to get rid of. I've used the dab-on glyphosate (I know - horrid stuff) to good effect before.

EDIT: beaten to it!

Hi I don't think you've got anything to worry about with bindweed growing in turf because one of the best ways to get rid of it is to mow, this weakens the weed evenually, more of a problem when it grows in borders, Ideally when laying turf its best that once the ground is prepared to leave for 2-3 weeks to see if any perennial weeds come back, a difficult task for pro gardeners to practice The worst thing you can do is use any chemicals as Bindweed or ivy will outlast your turf, plus if you poison mother earth your rain dance won't work, good luck