The duo will resume performances April 6; the run ends April 11.

Horne became ill during the second act of the matinee performance on April 2, and Staunton did not appear from that evening onwards, either. In their absence, their roles were taken by understudies Fergus March and Sharon Eckman, respectively.

In a press statement, Horne said, "I am delighted to say I am feeling much better and will return to the show tonight for the final week. I feel terrible for letting audience members down last week when I was ill, and I am so grateful for the wonderful letters of well wishes from everyone. We have all had an amazing time working on Sloane since January and I am just glad to be back in full health for the final week of this tremendous production."

Also in the cast are Simon Paisley Day and Richard Bremmer.

The production is directed by Nick Bagnall, designed by Peter McKintosh and Colin Richmond, and is a co-production between Michael Edwards and Carole Winter and English Touring Theatre. Kathy Burke is credited as creative consultant. To book tickets contact the box office at 0870 060 6632 or visit www.theambassadors.com/trafalgarstudios.