Quick question: anyone powered an Octatrack using the plug points on UK Trains?
I haven’t, myself. Would it be rude to ask why you’re asking?
Not rude at all! I just simply want to know whether I can employ them to use my Octatrack on the train. Assume they will be fine but wanted to check, as they often say ‘only for phones and laptops’ on a sign by the socket.
I assume that that kind of sign means that they don’t want people to use high-power devices like hairdryers or guitar amps.
I don’t think that there would be any problem with an Octatrack.
Thanks for your input @PeterHanes, as always 
But what about my hairdryer guitar amp avant noise feedback train band? This never would have happened if Thatcher hadn’t privatised British Rail. Booo!
Sorry. One other option is a battery pack. I’ve not used one myself but there seem to be some on the market that have enough volts and a good maH rating. One more thing I would advise - if you are going to use a train socket, invest in a small surge protector.
I noticed that train power sockets get cut once in a while, at least in France.
Knowing this, it make sense to use these power sockets only with battery powered devices…
I would use an external battery between the power socket and the OT to avoid brutal power cuts.