[quote=JE]Im attempting to replace my aging potterton EP2000 controller with a
Horstmann C27 controller.

Like you I am attempting to replace my Potterton EP2000 with a C27, but I am unable to get past first base. I can't work out how to remove the front cover of the Potterton. There are no screw fixings and as far as I can see no simple clip fixings?

The timer came with the house 18 years ago, less instructions.

Can any one out there help?

Andy G.