Yes cycling should be ok but it will work the calf a bit so take it easy but you can cross train ie rowing, swimming etc. Do lots of calf stretches and also stretch the tendons that run across the bottom of your feet by getting a tennis or golf ball (more painfull) and working the bottom of your feet over it. Sit on side of bed, put a pencil on the floor and use your toes to pick it 6 inches of the floor. drop it and repeat 5/6 times, this will loosen the tendons too.
I think you did too much too quickly when you restarted. Three weeks is about right for a calf strain. You have to rest up and do the same again but this time when ready to run do a couple of short runs of 2/3 miles to start with in week 1 and then 3/4 miles week 2.Probably not what you want to hear but unless you take it easy, it will not get better and you wont be able to do your training for London.
Steve G, (Liverpool fan?) when I say lots i mean may be 3 or 4 per session. Yes its a little bit risky if you dont do it properly because you need to be running i would say 5 times a week and have a really strong base to do this. But the high Intensity stuff won't be done until after a mile warm up, strides and a few miles of tempo. So easly 3/4 miles and she'll be propely warmed up by then.
Minni - the plan was run to 8 min miles and then go for it at the end but she started too fast 7.30 and 7.20 for first two miles and it took 8 miles for her to settle at race pace of 8mm. By then the damage had been done imo. She struggled at miles 16 (8.21) & 23 (8.33) but the others were pretty consistent and finished 3.30.45. We were looking for sub 3.30. She said the next day her legs were fantastic and she felt as though she hadnt given it everything.The Longs runs were easy pace, 9 mm or less, but midweek runs of up to 10M were done at race pace. I'm sure if she had paced it right from the begining it would have been achieved.