In 1959 she moved to London and became Senior Announcer for BBC Television. She then reported for the National News, as well as "Panorama" and "Town and Around" covering events such as Royal Ascot and The Henley Regatta and also presented the radio programme "Family Favourites". Between 1966 and 1970 she presented "Woman's Hour", the daily one hour live programme for BBC Radio 4.
In 1972 she joined Thames Television to present "Afternoon Plus" and a year later she began presenting a new travel programme, "Wish You Were Here...?" The series regularly rated among the 'Top Ten' achieving an average of 13 million viewers per programme. In June 2003 she completed filming the last series.
For five years from 1979 Judith hosted "Miss World" and "Miss United Kingdom". She was the subject of "This is Your Life" in 1981 and that same year co-presented ITV's coverage of The Royal Wedding. She commentates on Royal and State occasions and has regularly presented Royal Film performances and been the interviewer at The Derby. In 1995 she co-presented ITV's coverage of the VE Day celebrations.
From 1987-1990 she created and presented "Hot Property" for ITV and Channel 4, a series of magazine programmes highlighting all aspects of owning a home. In 1991 she joined BBC Radio 2 with her own daily show and in 1992 began a new radio series "Hi Days and Holidays with Judith Chalmers".
Judith's first book "50 of The Best Holidays" was published in 1987. The third edition of the magazine ‘At Home and Away with Judith Chalmers’, was launched in January 2003.
In 1984 she was elected to the National Consumer Council and in the following year she was appointed the only female member of The Peacock Committee, set up by The Home Office to investigate the financing of the BBC. In the 1994 Queen's Birthday Honours she was awarded the O.B.E. for her services to Broadcasting and The Holiday Care Service.
In 2002 Judith was honoured at The British Travel Awards for her outstanding contribution to travel and tourism and in 2003 the British Guild of Travel Writers presented her with their Lifetime Achievement Award.
Judith is President Emeritus of The Lady Taverners, Vice President of The Holiday Care Service and for 20 years was Chairman of The Appeals Committee of the Women's Nationwide Cancer Control Campaign.
In 1964 Judith married Neil Durden-Smith and they have two children, Emma and Mark and grandsons, Charlie and Sam.