I've removed the old seal and fitted the replacement but have been unable to remove the front panel so do not have sufficient access to re-fit the retaining spring. This model appears to be one where it is not possible to remove the front panel, so any help to explain how it is done would be gratefully received.

Dyfed, March 2017

Hi, yes thanks - was my 1st port of call. Unfortunately none of the video clips show exactly how to get the clip back on - there was one where the engineer was fitting without removing the front but the video conveniently cut from him starting to do it to the end, without showing how he physically managed to get the darned thing back without it slipping off one side or the other - but thanks for responding!

Dyfed, March 2017