Every 500 miles is soon enough Kenny lots of people leave it until 1,000mls.

Any garage will do it for you for a small cost it's a 10 minute job. Check they have not been too keen excess grease has been known to find it's way onto the front brake discs.

It's a good idea to tighten everything up with a spanner every 1,000 anyway and generally check all is well under there.

A bit of instruction on here.
www.gomog.com/allmorgan/Greasing2008~2011etSeq.html

gomog is quite a handy site to read every now and then for information.

2009 4/4 Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Connaught Green +8 prev