problems been solved.
tested the ac adaptor with a multimeter , result was no power reading .
so i checked the fuse and it was blown.
Realised what i did wrong . dooohh !!!
The adaptors kettle cable comes shipped with an 2 pin EU style plug end.
i purchased a plug in adaptor off the shelf at morrisons .
I should have looked more carefully at the packaging , by mistake I purchased a 1 amp rated fused shaving plug adaptor …lol
I ended up butchering the kettle cable plug off and retro fitting a standard uk plug and appropriate fuse.
Mind you i’m still a bit puzzled as to why the boards lcd displayed voltage on display… instead of % battery life…??
but for the moment its working fine and charging as I type , hope this post helps someone … from making the same mistake i did. A simple mistake but problems solved.