I have visited all the partner museums in the former BT Connected Earth programme taking photographs. I visited the Museum of London and the National Museum of Scotland in 2006. During the summer of 2007 I visited Porthcurno Telegraph Museum and the Goonhilly Earth Station (both below). Avoncroft followed during a THG swap-meet in March 2008 and several times since. The Science Museum in London which is a also a BT Partner, but doesn't have a specific Connected Earth Display. However, the Information Age gallery, opened in 2014 has a most comprehensive display of telecommunications history. I've taken a load of pictures of it may add it to the pages here when I get the time.
I'm showing just a few pictures of each museum to avoid spoiling the pleasure you'll get from visiting them yourself. (If you're interested for research purposes to know what other pictures I have from these museums, drop me an e-mail firstname.lastname@example.org)
Above is a composite picture of the Communicate!display in the National Museum of Scotland, Edinburgh.
Some of the fascinating telephone and telegraph items in this small museum near to my home.
Kidderminster Railway Museum
has some fine examples of railway telephones on display.
For more pictures of partner museums, visit Mike Fletcher's TelephonesUK site. http://www.telephonesuk.co.uk/museums.htm