There are I'm afraid some errors in the "sets" that they use. They do well to find buildings that look 1970s or earlier in their architecture. They then excel at clearing an office and refitting it with period furniture, typewriters, desk lamps, etc. Just a shame about the modern cat 2 flourescent lighting in the suspended ceiling :
But I'm nit picking - the whole concept of the programme is excellent, and it's well put together. I just hope it's not too expensive that it can't go on to more series.