How many suspected spies are there in the UK?

What were three spies living in Great Yarmouth and Harrow doing in the UK? Today it was revealed that three Bulgarian nationals were arrested in February and they've been in custody since - they were apparently working for Russian security services. They're awaiting trial but yet to enter any pleas.They'd been in the country for years, even baking cakes for their neighbours. So what were they up to? And how common is it for Russian spies to be hanging around in Britain? Jon asks former head of the MI6 Russia desk, Christopher Steele.And exactly two years on from the Taliban taking back power in Afghanistan, we talk to journalist Yalda Hakim about the conflict and discuss her work to get Afghan women back into education.Editor: Tom HughesSenior Producer: Gabriel RadusProducer: Laura FitzPatrickSocial Media Editor: Georgia FoxwellPlanning Producer: Alex BarnettVideo Producer: Rory SymonThe News Agents is a Global Player Original and a Persephonica Production.