FWIW Maplin have a 300W step down transformer for 30 quid. Order code VR05F.
I don't have this exact one, but I did buy a similar one from Maplin about 20 years ago and it's still regularly in use today. I'm not often one to sing the praises of Maplin, but in this case it wasn't a POS.
Be careful of underestimating current and power draw. They have a 100W wall wart style comverter too, about 23 quid. That may be enough, you'd have to check your soldering station spec. Personally I'd spend the extra £7.