I would suggest setting 30w up again, skew the lnb so signal is peaked.
Move the dish as instructed before and adjust the elevation.
This is 30w set up for leamington spa
Dish Setup Data
Elevation: 24.6°
LNB Skew : 20.2°
Turn clockwise standing behind the dish

This is 27w
Elevation: 25.5°
LNB Skew 18.7°
Turn clockwise standing behind the dish

You see not too much needs tweaking dish elevation and lnb skew wise.