Today I went to visit the Museum of London, which is just round the corner from the Barbican.  What I was actually there for was to see a bit of the BT Connected Earth collection, of which there was a small part there including a K2 phone box, a few old mobile phones and a line card from the UK’s first ever digital exchange to enter service, called the Empress (because it was installed at the Empress trunk exchange in London, having been developed by the GPO Dollis Hill research centre in the 1960s).

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