I don't understand the reasoning behind why you would want to get an FAA Dispatchers licence to work in a UK Ops department. As far as i'm aware it's not a recognised licence in the UK. Did someone suggest getting such a licence?
Of course should you wish to work in Europe (that's the land across the English channel) then many airlines ask for such a licence but generally recruit locally so it's worthwhile learning a language.
My advice to you is as follows
1. Spice up your CV keeping to the facts. Companies want to know your experience & interest in Aviation. If you're a bus spotter don't mention it.
2. Write to every airline, air taxi operator, biz jet operator explaining how keen you are on joining their company.
3. Don't listen to any comments on this board about such and such a company as most are just plain jealous that you've got so far and in 99% of cases it'll be doom & gloom.
Most important of all be positive. You will get what you want eventually.
Good luck!!!!