She soon joined the "Clean Up London" campaign. She encouraged hoteliers to join forces to attack the squalor that was affecting their businesses. Her enthusiasm also aided her election as vice-chairman of Highways and Work on 28 June 1977. Her anti-litter activities within the CUL campaign continued. The "Paddington Mercury" described Porter as "fast winning a reputation as Paddington's Mrs Mops". She also mobilised schoolchildren in her campaign, raising brooms over their shoulders like rifles at the Lord Mayor's Show and singing "Pick up your litter and put it in the bin". By 1978, Porter had been elected as Chairman of the Highways and Works Committee, in the same year she launched the "Mr Clean Up" anti-litter campaign.