LPT must be up to date when the sale closes, or you quite likely delay the close. Solicitors should arrange a pro rata payment from the buyer to the vendor to cover any prepayment (.e.g. if you close on 28th Feb 2022 the vendor should refund you 10/12 of the 2022 LPT which you paid). In the example you give, the refund to you should be 1/12 of the 2021 LPT and 12/12 of the 2022 LPT. The same applies to Management fees, if any.