Hi Rhys
I run in 270's and had a similar problem which i put down to the cheese string laces. Got some Yankz elastic laces and they totally sorted out the problem. Got a nice snug fit now with no rolling at all. Got mine from up and running in huddersfield. Not sure where else stocks em but i'm sure you'll find some by looking on google. Another option that many people on this forum recommend is lock laces. They're available from wiggle for £4.99