Is it for one person or two?
I think I'd be very comfortable on it, and would be able to be happy on, say £1500 now, so I could build up savings to hopefully overcome inflation similar to what it is now.
But I don't want to spend much on clothes, spend almost nothing on beauty treatments etc, which cost some people hundreds of pounds a month, am happy to run a small cheap car, have no DC with houses that I'd want to buy things for.
I don't eat or drink very much and have no expectations about regular fine dining or cocktails, I'd probably try it once, but I'd never say 'I must spend £1000 pm on regular high end meals out and cocktails or else I would be miserable'.
I have no desire for expensive household goods, Ikea is perfectly fine. I'm happy with basic TV, my idea of a good day out is a nice walk and maybe a £10 pub lunch, the other thing I spend money on is books for my kindle but I probably already have more than I could read in many years.
My basic costs that I'd feel quite comfortable at including running a car, some eating out, nice food etc, would be about £1000-1200 pm, which would then allow a holiday fund of say £400 pm which would give me several holidays per year because I'm happy with normal/standard etc, I don't want or expect 5 star luxury, I'm happy with somewhere average and look for deals to make my money go further.
I think the main problem would be if inflation went up significantly and eroded the spending power of the £2k pm.
Why did you ask the question OP?