Conservative MP James Heappey may publicly reveal his EU vote for the first time in a debate being organised by the Meetings Industry Association (mia) on Monday.

The MP is yet to reveal which way he will vote in the EU referendum, taking place on 23 June, saying he has made up his mind but is yet to even tell his mother what his decision is.

Heappey will headline the debate alongside fellow Tory MP Chris Heaton-Harris, who is a known Vote leave supporter.

The two MPs, both members of the All-Party Parliamentary Group for the UK Events Industry, will be joined by City Pubs and Britain Stronger in Europe campaigner Clive Watson, Vote Leave’s Luke Springthorpe, Redcomb Pubs’ David Franks as well as conference and event presenter Jeremy Jacobs and industry trainer and consultant Richard John.

The debate will take place on Monday 23 May from 6pm at The Honorable Artillery Company in London. The panellists will discuss the impact on employment, recruitment and contracts should the UK opt for the exit vote in the referendum. Similarly, the impact on international supplier contracts will be examined as the UK would be operating under different principles of EU contract law. The group will explore whether Britain will need to put different trading agreements in place with every country it imports or exports goods from.

Jane Longhurst, chief executive of the mia, said: “We are aware that many of our members remain unsure of the direct impact their cross on the ballot paper could have on our sector so we are delighted to have secured such a high calibre panel to talk about this important issue. Interest has been extremely high as it seems the industry is keen to make an informed choice when they head to the polling stations on 23 June."

A Q&A will take place afterwards where members of the audience can put their own questions to the panel.

More information at the mia's website, or follow the debate live on Twitter with the hashtag #miaEUdebate.