Let It Sew by Anna Martin

It’s the day before the last day of term and Year One teacher Harry Britton has a problem: all of the costumes for his nativity play have been destroyed by accident. The only person who can possibly help him is Edward Saunders, who runs a small tailor and alterations shop in the village.
Edward is more than a little shocked to be asked to make seventeen costumes for five year old children—he’s more comfortable making bespoke men’s suits. But there’s something beguiling and utterly charming about Harry Britton, so despite all his hesitations, he agrees to help.