At a rally by Save Hemel Hospital campaigners on Sunday, people were encouraged to write letters to Prime Minister Gordon Brown asking him to step in on issues affecting local NHS services.

More than 760 letters pleading for a rethink on decisions made about the hospital, including replacing A&E with an urgent care centre, were collected in a giant post box built especially for the event.

But campaigners believe there are thousands more people who may wish to write their concerns about the local NHS in a letter.

They have now planted special post boxes in shops across the town to collect as many as possible.

Campaigner Jan Maddern said: "We had a good number of letters handed in on Sunday, but it is a tiny percentage of the population in this town.

If everybody who wants to show their support for this campaign wrote a letter and dropped into one of the boxes, we will have thousands to take to Number 10."

The post boxes will be available from this Saturday, November 22.

Find your nearest post box:

Hemel Trophies and Jewellers in Adeyfield;

Warners End Newsagents;

Susan's Bakery in Grove Hill;

Sainsbury's customer service desks at Apsley Mills and Woodhall Farm;

Hospice of St Francis Shop in Highfield, Abbotts Langley, Berkhamsted and Bovingdon;

Parry's in Bennetts End and Boxmoor;

Montague's Newsagents in Kings Langley;

Gadebridge News;

Nash Chemist in Chaulden;

Buggsy's hair salon at The Denes in Nash Mills;

Mike Penning's Office at Hamilton House on Marlowes;

Hemel Hempstead Gazette offices on Marlowes;

The Volunteer Bureau in The Roundhouse on Marlowes;

Katie Picco Florist on Waterhouse Street;

Blue Box Storage at Maylands Industrial Estate.