Hi Gordon,
This is possible. Initially, I thought it was it's restricted to an admin action but it seems some people have sucessfully done it themselves. I will update your username for you now.
Here is link to the user guide for the forum https://wiki.simplemachines.org/smf/How_to_change_your_username
If anyone else comes across this thread and needs some help please webmaster@derbyshiresoaringclub.org.uk for assistance.
~Drew
Posted : 07/02/2018 06:12