returning stuff to dabs - advice needed

[dave heats]

ok, so my pair of fontopia headphones busted a month or so ago, and seeing as I only bought them in April, I've arranged a return to dabs.

Ive got a really easy question though, and its regarding the method I use to send the parcel back. Seeing as we're only talking about a small parcel, am I allowed to send it to them using bog standard royal mail recorded delivery?
Ive heard of others having grief with returning stuff to dabs, and dont want to send it off to them having used the wrong shipping method or something.

Bottom line, is recorded delivery ok?

[Ginza]

Recorded delivery is recommended because you have proof of delivery and a reference number for future comms. I only send stuff recorded.

What other way is their which gives you proof of delivery and online tracking for a reasonable price?