On Sat, 12 Jan 2008 11:20:40 GMT, fred wrote:

I'd say your first step is to balance the system, it is quite possible
that this has not been done correctly and radiators closer to the boiler
are stealing flow and therefore heat from the rest. Only if you cannot
achieve a satisfactory balance do you need consider redesign and
modification.

Thanks. Looks like I'm off to buy an IR thermometer then. Problem is,
they cost as much as a small radiator ;(