There will be extra increases in the Universal Credit monthly Standard Allowances (for 1 year only) from April 2020 for clients on UC-
single under 25 - £342.72(£256.05) single 25 and above - £409.89(£323.22) couple under 25 - £488.59(£401.92) Couple 25 and above - £594.04(£507.37)
In Working Tax Credit a similar increase takes place(for 1 year only). Instead of the planned Basic element of £1995 per year, the fgure will be £3,040.
Note however, there is no equivalent extra increase in other legacy benefts -IS, JSA(IB), ESA(IR), HB, CTC.