On Tuesday, 9 May 2017 19:47:40 UTC+1, ARW wrote:
Easy DIY job or not?

Yes, subject to the proviso of different generations of dish using different mounts

My parents have just had a load of work done (by me of course) and they
will need a quad LNB fitting.

Consider an octo when you're up there. Also research whether the new Sky Q system needs different LNB feeds from 'traditional' Sky Plus.

Owain