Did you spot it?
Any soap love will know that once you get hooked on a story line, you almost think it's real, even with the most ridiculous ones, it's easy to get wrapped up in them.
So this is probably why viewers get so annoyed at continuity errors and flaws in the episodes.
However, you'd have to be incredibly alert to notice this mistake, even though it's quite a big one.
At one point Billy ring's Jay Brown, and some people spotted that Billy's number- 07847 678781- showed up on Jay's phone.
Not too much later, Zainab ex-husband Ahmed Masood rings her, and her phone number was also 07847 678781.
It seems that Billy Mitchell and Zainab Masood have exactly the same phone number, even though Billy lives in the UK and Zainab lives in India.
https://twitter.com/mr_coxy/status/797171576106090497
