How HS2 gets in to Birmingham - route and progress

Looking by drone at the route of HS2 in to Birmingham city centre. This is a difficult construction project with other railways, the M6 motorway, and other things to work around. It's well underway now with a lot of work evident on the route. Also looking at the many obstacles at Castle Bromwich, Fort Dunlop and Bromford Bridge, under which HS2 is tunnelling.