You could be over £100 a week better off, without changing a thing.
If your annual salary is £14,000, you currently take home £13,200 every year. (after paying 20% income tax)
With the tax free unconditional basic income you get £7,000 (after paying 50% income tax) + £11,375 (tax free unconditional basic income) taking home £18,375 every year.
So, with Unconditional Basic Income You're £5,175 a year better off
That's almost £100 a week!!!!!!!!