7 watt PMR 446 rigs ( I think) £35

[Lightspeed]

That's not throwing a spanner in the works at all. Its a realistic approach.

I would go further. Anything that needs a PSU and wall socket to run is disqualified as a survival tool from the outset.

Personally my gear is selected to be highly portable and can run off multple power sources, and attach to various external antennas.

Lightspeed