SweetChilly,
There is no license within the UK for dispatchers. All training would be provided by the company which you are employed with.
Have you tried a search on Google? The job does require some initiative and lateral thinking! Oh - and it's dispatch!
ossieb88,
Try Menzies Aviation. Not sure if they are recruiting for LGW at the moment, but try and get any job with them. As HZ123 says, loaders or check-in agents tend to be a companies first port of call when looking for dispatchers.
Best of luck.