Firstly, the filming has been taking place around/inside a museum in Wales and we know that James Strong has been directing. A red double decker bus saying "Unbeatable Global Call Tariffs - Neon" has been spotted heading to "Braintree." Also, in the costume and make up van, a crushed bus of the same type has been spotted, so perhaps this is part of the plot.
Many believe Michelle Ryan was on location, but this hasn't been confirmed. Also, a dark brown, almost burnt looking skeleton prop was brought out of the Museum.
I'm hoping that this weekend I'll be able to look for this museum seeing as I will be in Cardiff anyway, (oh the joys of living in Wales!) so maybe some photos of my own will be up soon. If you have any photos, feel free to share them.