CTR on reaching state pension age - moving from UC to SP only

Quick query about the calculation of Council Tax Reduction on reaching state pension age.  A client reached state pension age this week. They are in receipt of UC until 28th June, I am expecting their final payment to be reduced by their first state pension payment which is due to be made on 12th June.  They will be in receipt of the full state pension and will not qualify for Pension Credit. They have applied for housing benefit.

Their Local Authority has ended their Council Tax Reduction award from this week stating income is too high. They have used the maximum Universal Credit award divided into a weekly amount along with their weekly State Pension award as the income used.This looks wrong to me however I am struggling to work out how they should be calculating income/applicable amount.

Should it be based on the UC award only until 28th June given, or should they be taking into account part UC (reduced amount due to SP reduction) plus State Pension payments due until 28th June and then just State Pension after that time?

CTR Pensioner rules apply in these cases, see Reg 3 of the Prescribed Requirements as amended.

The Prescribed Requirements are not consolidated on gov.uk unfortunately.

See also Reg 6 of the same amending Regs which provides for UC to be disregarded as income during that final AP by tacking UC onto the list of benefits not counted as income in a pensioner case.

In short, CTR behaves exactly like HB.