I've been using the son's 'driving practice' Ka2 a lot lately; use it for any trip he comes too with him driving, got mywork jacket in the boot so use it to commute - saves petrol cost.
Anyway, drove/moved Cougar once over a week ago, was informed number-plate lights duff (actually one was advised last MOT, other has gone flickery). Both early LED T10s I'd kept from T241 so ordered a pack of newer ones.
Today, went to install them, Cougar's battery flat.
Set up the charger, then replaced the T10s in the side repeaters to see how the new LEDs fare, then into the number-plate lamps too. Left the old ones in the sidelights - still both OK (always drive with headlights anyway).
So then on to the radio; flat battery so was requesting security code. Also, only finding five of the six CDs I knew were in there.
Thought it would be quicker to use the decode app to get the code than find where I'd written it last time extracted the radio enough to read the label serial number, cables prevented it coming further. App ceased working (was a front-end to a webpage that had moved), know I've got one on Windows PC but kids here using that, so back to Google Play to try some others, a few pay-per-code, a few wait several hours, then a free one
that gave an incorrect code, then another free one that had been downvoted on the store, but gave the correct code - that one stays installed and the code recorded in my digital notes app. Also found a website that instantly returns the same code -
https://www.freefordradiocodes.com/
The power connector had come out of the radio when I pulled it forward - it was caught around the back of the lower slide bracket, had to totally disconnect the radio to free the cable loom before reconnecting. Radio was a replacement on/after 2005 - still a Cougar 6006E.
Then to eject the five CDs - wouldn't eject the sixth as it wasn't recognised, slot as if empty. Tried inverting the radio (hadn't put it back since reading the serial label) but resorted to taking the top off (two small torx on the back - easy) then after jiggling the disc it was recognised and allowed to eject normally.
Tested, watched and recorded the action of the changer, reloaded the six discs and refitted the top and back into the console.

Reset the dash clock, started and ran the engine, tools/charger away and in.
I think the cause of the flat battery was an MP3/bluetooth transmitter in the 12v socket - the socket being live the device had recently started coming on spontaneously rather than only when invoked, so that's been disconnected.
Oh and I've a wifi OBD adapter which might also be responsible.