Not too many of these around, but becoming more common...
Late 1940's, made in Wales
Alcohol tank built into the base, boiler/firebox straps are springs and mine appears to have had a red painted boiler when new, some were green.

I like the step pulley with the side fill up plug.
What make is it?
This is a new one to me Nick.
Carl, Wylie Harris is the make from Wales at the Treforest Trading Estate in Pontypridd
Jim, I've had this one since May of 2010 and have seen between 5-10 others in this configuration selling for roughly £125-150
I have seen more green-boilered examples than my red-boilered above
And then there is this rare bird, which I have yet to add, one look at the prices may explain why

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It's interesting. You don't see one of these forever and then one pops up on eBay and then it seems to spur other sellers.