Heres another collection of photographs from filming at Tredegar House today, this time you can see David Tennant and Bernard Cribbins, is he who Russell T Davies was referring to when he said the Doctor was travelling with an older person?

Special thanx to Scooty for these, his photostream is here, with more photographs!

The riot cops in picture 8 have their faces covered under their visors, so perhaps they are not human?