Campaigners were out in force over the weekend, setting up Save Our Royal Mail stalls on high streets in London, the Midlands, North West and the South East.
In south west London, Twickenham residents gave a resounding 'No' to the Government's Royal Mail privatisation plans as CWU members took their campaign to the riverside suburb on Saturday.
Sarah pictured with London regional secretary Jim Kirwan
As the union's SORM Battle bus drove up and down King Street, local CWU members handed out leaflets to passers-by and asked them to stop and sign petitions and postcards to their Member of Parliament.
The MP for Twickenham is Vince Cable, the Secretary of State for Business, Innovation and Skills, which is the government department directly responsible for the controversial sell-off.
"If there was a vote in Twickenham, it'd be overwhelmingly against privatisation," said South West Middlesex Amal Branch secretary Sarah Woolaghan, whose branch covers the Twickenham area.
Ray Dunning with his two grandsons
"We're finding that people are solidly opposed to the sale of Royal Mail whatever their political views," she added, as people queued up to pledge their backing for the fight to defend postal services.
West London Postal Branch secretary Ray Dunning - who brought along two young helpers for the day, grandsons Frank and George - said: "No-one wants this privatisation, and we're going to keep up the campaign."
National CWU leaders also came along to Twickenham on Saturday, general secretary Billy Hayes, deputy general secretary postal Dave Ward, senior deputy general secretary Tony Kearns and head of communications, Kevin Slocombe.
Billy Hayes thanked members and supporters for their efforts both here and elsewhere, saying: "There's been fantastic support today - from our members and from the public, and our politicians need to listen to the people. Royal Mail is not for sale."
Dave Ward pointed out that "we're making a rock-solid case against privatisation - whenever people hear our case, they've backed us," and Tony Kearns added: "Today, local Twickenham people have made it clear that they, like the majority of people right across the UK, don't want their postal service privatised.
"Please take note Mr Cable."