The veteran sight-lines expert has issued a 'call to arms' over what he claims are discrepancies in the current draft of the London View Management Supplementary Planning Guidance.
A leaflet circulated by Moggridge late last week warns that the draft should be rewritten so that 'the defined views, and other important views, really are safeguarded for the future, while allowing an intelligent disposition of fine new high buildings'.
Views at risk as a result of the document, Moggridge claims, include the profile of St Paul's Cathedral from the south end of Waterloo Bridge, and St Paul's from the north of the National Theatre.
Moggridge's campaign comes in the wake of the Historic Royal Palaces lodging an objection to KPF's Heron Tower on the grounds of its impact on the Tower of London.
In a letter dated 5 October, conservation director John Barnes says: 'The revised proposal now submitted would, primarily by virtue of the proposed increase in height, add to that marginal harm, and so be more detrimental to the setting of the Tower of London World Heritage Site than the consented scheme.'