Hello, I don't know if this is of any help, but I emailed Healthy Start requesting that they called me and when they called, the call came from 01519067000. When I try to call this number back it says that it does not accept incoming calls, but I didn't know if this would be a clue towards finding an accessiable geographical number.

But I thought that everyone should also know that if you email them at helpdesk@tiu.org.uk and ask them to call you, they will call you back. They actually telephoned me back within the hour, which was most impressive.