Some U.K. models have a single control which selects the program and wash temperature, others have a separate temperature knob which can be set independently of the actual program. Either way, most modern washers have some sort of program for "wool" or "delicates," although there are some models with the all-in-one control which do not actually have a cold wash setting as such.
One way you might be able to work around the problem it is to find a "hand rinse" program and just use that as your cold wash cycle. Some machines fill via the soap-powder tray for rinses, others bypass it, so depending upon the design you may need to just throw the soap powder in with the clothes before you start. You'd have to play around with the cycles to find one suitable.
By the way, 30 C is not all that hot anyway -- Only 86 deg. F.