Heater arrived. It's utter bollocks. Tested it with a watt meter. It's not 500W but 394w, part of which is to power the rather noisy fan. The red glow inside is not a heating element but some red / orange LED lights, placed to simulate the glow of a heating element.
The unit is awkward in the plug socket and made no material difference to the temperature of the (very small) room. 16c when I plugged it in asn still 16c 5 hours later. The "temperature" setting made no difference to the output of heat or the wattage consumed by the appliance so there is no point ot the temperature control whatsoever. It's just there to look impressive. It serves no other purpose. While the construction of the unit seems robust enough it still seems cheap. The programmable timer does work, however. You can set it anywhere from 1-12 whole hours to turn off. You can't set it to turn on. You can't put it in an extension plug, circuit breaker or socket doubler. Utter garbage. I also got the Dimplex heater (similar type of product). Looks instantly better. Will test it tomorrow.