Your pounds are worth lots of US $, I can tell you that.
Just google "20 usd in pounds" to find out: 13.76 pounds.
I have a RoadID wristband. I also had two different FiXX (neck tag) but it started bothering me when I was running, as it jiggled around a little and irritated my neck.
My husband and his dad have both been equipped with wristbands.
My mother has the ShoeID.
They all wear it faithfully.
I have the following info (with explanations in brackets)
FIRSTNAME LASTNAME 77 (my year of birth)
Vancouver BC Canada
Chris (Partner) His-Cell-Number
In-Laws Their-Phone-Number (my in-laws are in town)
Brother His-Phone-Number (my parents' place of residence varies, my brother stays put in another town)
NKA (means "no known allergies") A POS (my blood type, which is useless because they would crosscheck anyway) ORG DONOR (because I really care about that one)
I much, much recommend that you get something similar and that you wear it faithfully.