agfoxx,
At some point you will have to give up your career with the Beeb. Could you get by as freelance journo? If so, you could do that to keep some money coming in while completing modular training. After that, you could build experience as and where you can find it while still doing some writing to supplement your income.
You would appear to have the ideal back-up career to complement flying, so I'd say go for it.