Cheers for all the help
Finally managed to do it today.
We gave up yesterday as it just kept draining and draining - 3-4 litres probably in total. The car just started first time after that too. I drove it after that last night.
This morning we loosened the drain screw and it only bled about half a litre (!!)
So we took the canister off (mission in itself) and swapped the filter over. Job done.
Bizarre.
So thats Oil, Oil Filter, Air Filter, Fuel Filter and Cabin Filter changed at my inbetween service service.
The next one has to be done at a VAT registered garage to keep my warranty direct warranty valid (ouch)
Thanks again.
Chris