Well done Team
I might, possibly, if I'm lucky, and all things going well, be about to allow myself off to clamber tentatively off the injury bench and join in again. 
10 days of rest, plus two deep sports massages on my calf have got me to the point where I'm willing to test it with some gentle runs and see how it responds.
I did 5.5 easy miles yesterday which felt fairly normal after the first mile or so, and I followed it up today with another 4.5 around the streets of London. If I'm being completely honest my left calf still feels tight and a little stiff / bruised, but it is a thousand times better than it was, and I'm hoping that some slow, easy, flat miles will gradually loosen it out completely.
Tomorrow is a rest day, and I'm going to see a physio and hopefully get some strengthening exercises to make sure it doesn't go pop as and when I start back on some proper mara training...