That's a real 'how long is a piece of string' question OP.
What do you count as savings? Some people count all money they don't spend that month, others only genuinely spare money after money budgeted for annual and irregular expenses are accounted for.
How much spare money do you have? If you're struggling to cover the basics, £200 savings a month is probably unachievable. If you're living with your parents, earning a professional salary and are supposed to be saving for a house deposit, you could probably save a lot more than £200.
How many people is it to cover and what are their circumstances? If you're mortgage free, in a secure job, and have a paid for car and nothing needs doing on the house, it might be OK, but if you have a precarious high paid job and are the main family earner, then you should probably try to save more than £200 pm.
I don't know how much we save, I don't really count it. But seeing as our circumstances are almost certainly very different to yours, telling you a number doesn't answer the question in your thread title, or the different one in your post 