Great clip! The series was 'Second Thoughts', which ran from 1991-1994 on 1TV. Curiously it was originally a BBC Radio series, and for a time they ran concurrently. The first girl is Belinda Lang (of 'Dear John' and '2 Point 4 Children' fame). Lynda Bellingham played the same character in a spin-off series "Faith in the Future' (ITV 1995-1998).
Domino