The preferred option is to send UK pounds (wrapped in a letter so it is not obvious that money is enclosed). However, if you have difficulty in obtaining UK currency, then follow these directions-
1. Determine the equivalent of 15 UK pounds from the current currency exchange rate.
2. Add the equivalent of 2 UK pounds for the exchange fee
3. Round up the total to the nearest bill (Do not send coins through the mail).
Wrap the bills in a letter and send to
G Randall
Somerton House
20 Palace Gardens
Royston
Herts
SG8 5AD
UK.
If you have an email address, make sure you enclose the email details.