I checked and indeed The Carpenters played their first British concert at the Royal Albert Hall on the 24 September 1971. I'm sure the couple would have enjoyed the show. A somewhat quirky but enjoyable episode with Morse showing signs of becoming the Morse we know and love. The appearance of Aunt Gwen was a suprise and sadly funny to watch their bickering. All in all a good episode with a slightly different feel, the conclusion was somewhat of a suprise, also nice to see all the old vehicles and period details which are done a lot better than other shows. A great show and deserving of its praise.