Performance after v1.1.1 update

[murrayalex]

Since the V1.1.1 update, whenever I fly out or near to Manchester the performance really reduces and when I check the FPS in devmode it says "limited by main thread", however even after I'm away from the Manchester area the performance continues to struggle and feel very choppy/laggy when looking around and switching cameras etc.

The only thing that fixes it is a restart and to avoid the Manchester area.

Any help would be greatly appreciated