Hi there--I am moving to London from the US and have two children, one is a few weeks old and the other 2 years old. I've tried to avoid the double stroller, but my 2 yo is still a bit untrustworthy when it comes to not darting out into the road. I am thinking of getting a double stroller but have heard they can be a nightmare in London. Are they best avoided? I was thinking of the Phil & Ted's stroller. Many thanks.