Other than an electric one, is it possible to have a towel rail with a
combi, that doesn't just come on with the heating?

In a system with a hot water cylinder, you usually connect the bathroom
radiator/towel rail to the hot water side of things, so the rail get's hot
in the summer too - I guess the only way to do this with a combi, is by
having it on a separate zone, controlled by a time clock?

thanks for any comments!

Toby...