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Published 09:22 23 Jan 2015 GMT
Updated 13:34 11 Jun 2015 BST

The pair are to reunite for the show
Barbara said: "I had such great fun filming this with Pam. At times we completely forgot we were being filmed and we got terribly carried away. In fact, we got quite outrageous!
"It was such a lovely afternoon, we giggled for hours. In fact, we didn't want it to finish."
Other characters to appear in Eastenders: Back To Ours include Kat (Jessie Wallace) and Alfie (Shane Ritchie) as well as Ian (Adam Woodyatt) and Jane (Laurie Brett).Explore more on these topics: