Fresh Fields S03E03 - Moveable Feasts

Hester looks forward to babysitting Guy while Emma and Peter attend a function in London; meanwhile she delivers Meals on Wheels to one of Sonia's old ladies. She gets lost and causes a traffic jam, and policeman she collides with escorts her home, mistakenly believing that she's the expectant one. The next day when Guy is there, the policeman stops by to check on Hester and is amazed to see her holding such a large baby - for her supposed newborn.