Hello Stuart,
Many thanks for the additional information.
Again, as if it were mine - Crossland filters would be at the bottom of my buying list. Once well respected, but now a bought out brand name by ECP, and supplied by Halfords via. a supplier link with ECP. Just as background, if you buy mixed paint aerosols from Halfords, you are actually buying from ECP.
I’m not claiming the filter is at fault, and your subsequent issue may indeed be a coincidence, but I’d be removing the Crossland filter and throwing it as far as you can, and buying a replacement Mann, Hengst, or Meyle filter, and screw that on and see if the situation improves.
Perhaps you could let us know how you get on Stuart.
Kind regards,
Gareth.