The government has rolled out its test-and-trace system in England. Bloomberg's U.K. political reporter Joe Mayes explains how it works and why it's taken so long.

But first, Jeffrey Donaldson, DUP MP for Lagan Valley and the party's leader in Westminster, tells Bloomberg Westminster's Sebastian Salek and Roger Hearing the co-ordination of coronavirus policy between Northern Ireland and the Republic of Ireland has not always been as smooth as he'd hoped.

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