Just picked one of these in Porstmouth B&Q to use in the garage, not sure if it's nationwide as it's part of the clearance.
Both models were available, a couple of the Inverter 5006 and at least half a dozen of the Corona RX23. Both were marked up with the same price.
Runs on parafin or Tozane.
The brochure explains it all.
More info hereInvertor 5006Corona RX23