Crowdsourcing website HelpMeInvestigate.com has launched probes into MPs’ campaign expenses. The move follows Channel 4’s investigation into Zac Goldsmith, who is alleged to have exceeded the spending limit set for his Richmond constituency.

So far, the focus has fallen on the closely-fought Edgbaston race, where Labour’s Gisela Stuart held her seat with a reduced majority of 1,274, but investigations have also begun in other Birmingham constituencies and in Brighton.

Posting on the HelpMeInvestigate.com blog, the site’s founder Paul Bradshaw said he was undergoing this investigation after Goldsmith and the Conservative Party claimed that they were justified in only accounting for election materials that were used in the campaign, as opposed to materials that were not used as they had become out-of-date.

“We want to see if this is true. Are other candidates not claiming for the expense of ‘unused’ materials? Or is Goldsmith an exception?” writes Bradshaw.

“We’ve started one investigation in Birmingham but would really welcome sister investigations in other towns and cities.”

The website is currently in beta testing, meaning new users can only access the site after requesting an invite.

HelpMeInvestigate on campaign expenses at this link.