So I tested the relays using this guide http://www.autoshop101.com/forms/hweb2.pdf (page 14 on) and went through things and could find no issues. Cleaned up the battery terminals and connections, replaced fuse 23 in the footwell, even though it was not blown there was some discolouration to the legs. Battery was showing 80% on charger and wanted to get safe before rain started so decided to do one final test by adding the 3 relays in the boot one by one, testing the ignition between adding, to see if the fuse under the bonnet blew and it didn't. Gave the key a turn and vrooom fired into life. :woohoo:
Battery connections were showing 13.99v with engine running and dropped to 12.92 once engine was off. Will check what the battery is showing in the morning and may take it to the local motor factors for a load test. hopefully looks like a potential combination of low battery and dirty/poor connections.
Had to post back as one of the most annoying thing I find with forums is the vast majority of OPs never respond with a final resolution once they are sorted.
Thanks @Roverlike and @sworkscoooper for the pointers and helping find some other items for me to fix