I don't know where most of you go to purchase your servicing/maintenance requirements but I've recently come across this firm:
formatting link
(Sutton Autospares)
and have found that their prices are extremely competitive on oils/filters/grease/brake fluid and brake parts. Cheaper than my local A1 Motor store even when postage is included. The service is prompt and they will answer e-mail queries also very promptly.
I have no connection with this company at all - but highly recommended...
Kev