In message , at 22:58:54 on Mon, 15 Apr
2013, Mizter T remarked:
I will certainly send a
registered mail rather than the normal royal mail

It's called "Special Delivery" now.

Not necessarily.

"Signed For", aka Recorded delivery.
http://www.royalmail.com/personal/uk-delivery/signed-for-1st-class
http://www.royalmail.com/personal/uk-delivery/signed-2nd-class

Rather cheaper than SD.

Signed-for is the replacement for Recorded Delivery; the OP was looking
for Registered, which has been replaced by SD.
--
Roland Perry