Mikedaw,
I sat this course ten years ago, and it is worth doing. It can still be done by distance learning. The college in question is East Surrey College, and the address is as follows...
East Surrey College PLC.,
Airline Studies Department,
The Adult Education Centre,
Court Lodge Road,
Horley,
Surrey,
United Kingdom
The course costs may be high for someone domiciled outside the UK, and the qualification gained (City & Guilds of London Institute Certificate in Basic Aviation Studies) is not recognised internationally.
As an alternative, I would check out if the CAAA recognises US FAA Flight Despatcher Licences. If so, I can recommend a school in Dallas Fort Worth.
Hope that helps.
Tailwinds,
