These price increases will help us continue to deliver and sustain the Universal Service in challenging circumstances." Parcels revenue overtook letters for the first time in Royal Mail Group's interim results. Royal Mail has also announced the last posting date for Christmas 2020: Friday 18 December for second class and second class signed for, Monday 21 December for first class and first class signed for. Tuesday 22 December for Royal Mail Tracked 24. Prices from 4 January 2021 for Royal Mail Wholesale customers are available on its website.