Cheers Neil - the CTEK kit looks good: at the moment I've got a cheaper Halfords charger which just gives a red/green indicator, but it sounds like I could do with a more sophisticated device.
The RAC guy who recently came out to start my Coupe (I'm a regular customer, probably with my postcode saved in his van..
..) suggested that I buy a device that also tells you the battery condition, which my Halfords one definitely doesn't
...