ERR3340 Oil Filter issues?!

Hello folks,

I have recently fit a 2.5TD to my Series 109 "Bertha"

Bertha had her maiden voyage today with her new heart, and unfortunately let the side down a bit in the guise of a leak at the oil filter.:doh:

Have an aftermarket oil filter (can't remember the name) so thought maybe I should try the proper job ER3340 -

- or could it be an issue with the filter housing? Anyone else encountered this problem?

\Thanks for your help.

is there 2 center seals on thread that filter screws on as old seal sometimes gets left behind stops outer seal getting squashed enough,or poor outer seal

Pretty sure just the new seal on, but will double check when back under the girl tomorrow!
Thanks