I am new to Armortek myself,I have recently finished my Panzer 111L and now waiting for my Comet.
When I was first looking at the Comet I thought that the Photo's and information would be hard to find at first,but I was wrong.
There are already various links in the Comet section for photo's and the two recommended books
Armor PhotoGallery British Criuser Tank A34 Comet
The Chief Inspector of Fighting vehicles Comet 1 Handbook from M.I.R.S
The first has lots of info and photo's
and the Comet 1 Handbook is brilliant it almost tells you how to do the nuts and bolts up on the full size Comet,the detail is great.
Try these links for Comet Photo's
There are 419 photo's in total with details of the Comet.
Then choose A34 Comet.htm from the list.
For Photo's in pdf on the shadock site
I found if you miss the www out and use a capital S in Surviving and
a capital C in Comet,it loads straight into the pictures.
There is a Comet in the War Museum at Duxford which is just a bit up the road from you on the,cant remember whether its the M11 or M10 but I know its junction 11.
As far as a subject goes for my Comet,after reading books by Osprey and looking in Wikipedea I thought there were Comets in Korea in reconaisance platoons,but it seems they are both wrong and they were Cromwells,although I can understand getting mixed up in the heat of battle but not writing a book.
As far as I can see the Comet has 4 return rollers and none of the Cromwell variants had any.
That left South Africa or Burma.
But if I end up with a green one it will be a tank from the 2nd Fife & Forfar Yeomanry,11th armored Division.
Good luck and have fun