Peter Gammons, the UKIP candidate in next month’s London mayoral election, has been roasted on Twitter after posting a video promising to rip out low traffic neighbourhoods if elected – with a number of users of the social network pointing out that the Mayor of London has no such powers.

Dr Gammons – he has a PhD from Canon University, Florida, and on his personal website describes himself as one of the world’s “most famous and in-demand inspirational and motivational speakers” – said last November when he was selected as UKIP’s candidate that if elected, he would “put a stop to [Sadiq] Khan’s war on motorists.

“I am passionate about supporting London’s taxi drivers and will launch a full review into reopening roads which Khan has closed,” he added.

Yesterday, he posted a video to Twitter filmed at one of the entrances to the Northfield LTN in the London Borough of Ealing, pledging to scrap such schemes if he were elected mayor – but as a number of Twitter users pointed out, ignoring the fact that Gammons lies a very distant fifth place in the polls, there are a couple of flaws in that pledge.

First and foremost – and a pretty much insurmountable hurdle, one might think – is that the Mayor of London has no such power, with the installation or removal of LTNs a matter wholly within the remit of the borough in question.

(Curiously, in the case of Ealing, opposition to LTNs now unites a UKIP mayoral candidate with the local Labour MP, who has consistently criticised the council, controlled by her own party, for such interventions).

> Labour MP says low-traffic neighbourhoods “have left women feeling unsafe”

Gammons insisted that his motivation for posting the video was to support people who lived in LTNs.

Yet when Felix Lowe – whom you may know from his Blazin’ Saddles blog on Eurosport and book Climbs and Punishment, and who lives in the very LTN where Gammons’ video was shot – replied outlining the benefits of the scheme to locals, he was blocked, as were others expressing support for the measures.

Another Twitter user, with tongue firmly in cheek, provided examples of long-standing LTNs in West London which would no doubt have to go too, should Gammons become mayor.

And this post in response to Gammons’ video highlights one of the reasons why now more than ever before LTNs are needed, with modern technology directing motorists away from main roads and through what had often been quiet residential streets to avoid congestion.

While Gammons is firmly opposed to LTNs and the emergency cycleways that have appeared in London over the past year or so, he does have his own rather singular views on the type of infrastructure that best suits people who choose to get around the capital by bike.

“I want to get London moving again,” he said when his candidacy was announced. “There are over 2 million miles of unused tunnels, streets, and chambers beneath London. This abandoned network was secretly built by the Ministry of Defence, Post Office, and BT.

“I want to convert these disused spaces into walkways, safe cycle lanes, and create the world’s first underground ‘Pod’ transport system. This ambitious project will speed up the city and clear up London’s congestion – an issue that consecutive Conservative and Labour administrations have failed to solve,” he added.

This week, an opinion poll put Khan on course to receive 51 per cent of first choice votes, with Conservative candidate Shaun Bailey a distant second on 29 per cent.

Green candidate Sian Berry and Lib Dem Luisa Porritt are joint third with 8 per cent, with Gammons lagging well behind in fifth place with just 1 per cent of respondents saying he would get their first choice vote.