Convenience store retailers are gearing up for a super Saturday of sales when the royal wedding of HRH Prince Harry and Meghan Markle is followed by the FA Cup Final on 19 May.

Less than a mile away from the royal wedding’s location in Windsor, Budgens of Eton is preparing to celebrate the event with special Royal wedding branded beers, supplied by the local brewery.

The store is also supporting a community party down Eton High Street with a selection of products. Manager Parimal Valamiya said he was “very much looking forward to the fun-filled day.”

Meanwhile, over in Orpington, Kent, Anita Nye, manager of Eldred Drive Stores (Premier) has just received her order of in-store decorations, including Union Jack bunting and flags, to get behind the event.

“The Royal wedding of 2011 provided a fantastic boost to sales and Prince Harry’s one is likely to be similar, especially with the added boost of the FA Cup final in the afternoon,” she said.

“The local council is televising the wedding on a large screen in the high-street and encouraging people to bring picnics so we’ll be stocking up on ice creams, soft drinks and chilled food to go products. We just have to hope the sun shines!” Anita added.

The royal wedding is expected to generate £561m in retail revenue according to predictions by research company IBISWorld.

Sales of food and drink for entertaining at home are forecast to account for a quarter of that sum, at £142m.

“Home entertainment is expected to perform strongly as families and friends gather around homes to celebrate the Royal nuptials whilst indulging in elderflower and lemon cakes and Britain’s favourite fruity summer cocktail Pimm’s, ”retail analyst Gaetana Mak said.

“Competitive spirits are likely to run high with family games like badminton and much-loved traditional board games expected to play a part in the celebratory atmosphere,” she added.

The royal wedding is expected to be watched by an estimated 25 million viewers across TV channels.

UK tourism numbers are also expected to be boosted by an extra 300,000 visitors over the month of May. 

The couple will tie the knot at St George’s Chapel, Windsor Castle, at 12 noon on Saturday 19 May. The FA Cup Final between Chelsea and Manchester United will kick off at 5.15pm at Wembley Stadium. 

The wedding of Kate Middleton and HRH Prince William in 2011 was thought to have generated an additional £500m for shops and pubs according to the British Retail Consortium.