The VAT registration limit normally increases in line with inflation each year, however, the limit has been frozen at £85,000 until 1 April 2020. At the same time the deregistration limit remains at £83,000.
There had been rumours that the VAT threshold would be reduced so that more businesses would be required to charge VAT on their sales. The UK currently has the highest VAT registration threshold in Europe.
Note that the introduction of Making Tax Digital (MTD) for VAT in April 2019 will apply to those businesses above the registration limit. Freezing or reducing the threshold will bring more businesses within the scope of MTD.