Monzo has just hit 300k users today 
That means that Monzo’s gained another 100k users in less than two thirds of the time that it took them to reach 200k users.
100k 24th Jan > 200k 11th May = 107 days
12th May > 15th July = 64 days
64 / 107 = 60%
I expect we’ll get official confirmation of this on Monday… (it wasn’t mentioned in the blog post announcing the initial rollout of the current accounts 
).