My student son is moving into his new flat this week, also in London, SE1.
He will have an income of 17k. He is 21. He has 3yrs of paying rent under his belt and cracking references. He will be sharing with 2 other adult working friends.
This was his (our) experience.
For every flat they looked at there were 30+ others looking at it
Most flats were gone the same day.
If they liked one they had to show the landlord what they could offer, commit to a lease of 2yrs and some were 3, and in some cases were encouraged to offer above the asking rent. They were turned down for over 20 they offered on.
They had to pay a holding deposit of half a months rent = 500 each
They had to pay 5 weeks rent in advance = 1150 each
They had to pay 1 month rent deposit = 1000 each
They were required to have a combined income of £95k
They were all required to have guarantors (only DS is a student)
The rent is £1k pm each. The bills - gas, electric, water, council tax, Wi-Fi, are going to be £250pm each.
So that's £2650 to secure the flat. £1250 monthly rent/bills. References, guarantors, millions of paperwork, and 6 months from start to finish.
And that's before any daily living costs like food, transport etc