With the current pay deal to be negotiated soon, it would seem practical to put First Aid payments on the agenda. Currently a qualified first aider is paid £200 per year for dealing with casualties on the underground, be it none, 1 or a hundred.
I would be interested to know what the same qualification gets on metronet or tubelines, as someone based in a small office for TFL actually gets £265 a year. Having asked around it appears that this ammount has stayed the same for at least 15 years, considering basic pay has increased by over 50% in that time, then its about time the balance was redressed.