'Dispatcher' and 'TCO' in the UK are generally the same thing.
Other than Virgin, I'm not aware of any airlines that employ their own TCO's/Dispatchers? I know Jet2 do, but the pay is the same as handling agents so no advantage to that.
Even Virgin 'Little Red' TCO's are now Servisair at EDI/ABZ/MAN, and Swissport at LHR.
There's no career in dispatch in the UK other than if you're employed by BA/VS. Handling agents pay £7-£8 depending on location and you won't get much more than that regardless of what skills you have