So, forgoing the footie-fest when I got home I decided to check all the points that you suggested Jonathan, that's after having charged the new Honda battery for 24hrs this time with my old trusty analog charger directly connected to the battery posts in the front.
Now bearing in mind this battery is brand new and it read 12.5v straight out of the box on Sunday and also held rock solid on my drop tester.
Yet when I checked the voltage on getting home today the battery read 10.42v at both the front and rear of the car and the analog charger was making my alarm siren giving a strange, quite squeaking noises while I could hear the charger protesting while still connected and changing.
The Clifford alarm has got non volatile alarm and immobiliser circuits so when in valet mode it's completely by-passed.
I disconnected the charger and tried to crank the engine after turning off the immobiliser, the dash light went completely dimmed out in the crank position and not even enough power to generate a loud clicking noise at the starter, I've never heard or witnessed this before on any car and I've worked on a good few hundred in my time.
Biggest question therefore is why has the battery not charged and actually dropped in charge to 10.42v???
It's as if though something is massively restricting it from being charged or massively discharging it while charging, very odd.
I thought last night that my CTEK MX5 charger had become faulty which is why I connected my old analog charger, but the CTEK is fine as it fully charged my Audi A4 battery in just 2 hours.
I then connected the booster jump pack at the rear and it cranked and started straight away.
I noticed that the short jump pack leads got very hot in the short time it took me to walk around to the near side rear to remove the jump pack terminals.
On its fast cold tick over the alternator kicks out a very healthy 14.58volts.
Any suggestions as I've run out of ideas????
I'm tonight going to remove the battery earth this time before fully charging the battery over night on the CTEK.