A worker makes a stamp to add part of the design to mugs commemorating the wedding of Britain's Prince Harry and Meghan Markle at the Emma Bridgewater Factory, in Hanley, Stoke-on-Trent, Britain March 28, 2018.

Souvenir mugs to commemorate the wedding of Britain's Prince Harry and Meghan Markle are stacked at the Emma Bridgewater Factory, in Hanley, Stoke-on-Trent, Britain March 28, 2018.

A worker adds transfers to mugs commemorating the wedding of Britain's Prince Harry and Meghan Markle at the Emma Bridgewater Factory, in Hanley, Stoke-on-Trent, Britain March 28, 2018.

Plugs are placed on moulds for mugs being made to commemorate the wedding of Britain's Prince Harry and Meghan Markle at the Emma Bridgewater Factory, in Hanley, Stoke-on-Trent, Britain March 28, 2018.

A worker prints a design onto a souvenir mug to commemorate the wedding of Britain's Prince Harry and Meghan Markle at the Emma Bridgewater Factory, in Hanley, Stoke-on-Trent, Britain March 28, 2018.

Clay is injected into moulds to make mugs commemorating the wedding of Britain's Prince Harry and Meghan Markle at the Emma Bridgewater Factory, in Hanley, Stoke-on-Trent, Britain March 28, 2018.

A worker prints a design onto a souvenir mug to commemorate the wedding of Britain's Prince Harry and Meghan Markle at the Emma Bridgewater Factory, in Hanley, Stoke-on-Trent, Britain March 28, 2018. REUTERS/Carl Recine.

A portrait of Britain's Queen Elizabeth hangs in the Decorating Studio where mugs to commemorate the wedding of Britain's Prince Harry and Meghan Markle are being made at the Emma Bridgewater Factory, in Hanley, Stoke-on-Trent, Britain March 28, 2018.

A worker prints a design onto a souvenir mug to commemorate the wedding of Britain's Prince Harry and Meghan Markle at the Emma Bridgewater Factory, in Hanley, Stoke-on-Trent, Briatin March 28, 2018.

A worker uses stamps and paint to add part of the design to mugs commemorating the wedding of Britain's Prince Harry and Meghan Markle at the Emma Bridgewater Factory, in Hanley, Stoke-on-Trent, Britain March 28, 2018.

A worker adds transfers to mugs commemorating the wedding of Britain's Prince Harry and Meghan Markle at the Emma Bridgewater Factory, in Hanley, Stoke-on-Trent, Britain March 28, 2018.

The factory stamp and decorator's initials are seen on the bottom of a mug produced to commemorate the wedding of Britain's Prince Harry and Meghan Markle are being made at the Emma Bridgewater Factory, in Hanley, Stoke-on-Trent, Britain March 28, 2018.