Found it. It's called the Blitz Street TV Series
Must have been Ch 4 in the UK
About , Series & Episode, Pictures and Articles can be found on the following link
Blitz Street - Series 1 - Episode 1 - Blitz Street - Channel 4
More Video, photos and information here
Blitz Street TV Show - National Geographic Channel - UK
Blitz Street tells the story of the Blitz as it has never been told before. This two-hour special aims to highlight the true horrors of the ferocious and constant bombardment of the Blitz, and to explain why, ultimately, it failed.
Blitz Street itself is a row of terraced houses, specially built on a remote military base. The 'Street' will be subjected to a frightening range of large-scale high explosive bombs and devices similar to those used by the Luftwaffe. With precise measurements of the supersonic blast waves and flying shrapnel, this programme reveals the devastating impact of real explosives on bricks and mortar, allowing scientists to study the awesome power and anatomy of Second...