Electricity bosses will be questioned by a London council over the number of exploding pavements in the capital.
The representatives from Ofgem and UK Power Networks (UKPN) will give evidence to Westminster City Council.
It comes after figures revealed there have been 13 incidents in Westminster this year compared to three in 2010.
Ofgem's Maxine Frerk and UKPN's Basil Scarsella will explain why these explosions are happening and whether current investment is adequate.
Figures from the Health and Safety Executive show there were three explosions in 2010, increasing to seven in 2012 and eight in 2013.
Westminster City Council said in July a van driver had a lucky escape in Piccadilly when the pavement exploded followed by several other explosions which lasted for more than 10 minutes.
The explosion was caused by an electrical fault in a link box chamber, it was subsequently found.
Ofgem has previously disallowed a proposed project worth £30m to improve the quality of electricity supply in central London because it was not considered good enough value and would have impacted upon consumer electricity prices.