Stupid question alert - what's a covering letter?

[SneakyGremlins]

I need to send some evidence about being exempt from prescriptions to the NHS with a "covering letter".

What's that? just a letter saying "Here's the proof you asked for"?

In response to our conversation on/letter dated.. please find attached the evenidece requested.

Include any relevant reference numbers in the letter too

Basically yes!
Make sure it lists everything you are sending so that they know what should be attached.
Send it to the person/address they say, and start the letter 'Dear the person'
Include any reference/case numbers already in use.

dear Madam/sir
please find enclosed the requested evidence that I believe shows I am exempt from paying NHS prescriptions. This includes a copy of
a
b
c
yours
Sneaky

Brilliant, thanks!

Pretty much yes. So you don't just shove the stuff in an envelope for someone to open and say WTF is all this and why have I been sent it? You put a in letter with your address and contact details at the top that says I am you asked me for I have enclosed , plus any other relevant info, yours sincerely

Ha ha - I'm slow, my keyboard's playing up.