Energees' bid equates to 24 pence per Regal share, a 30% premium to the company's closing share price of 18.5 pence on 9 December.
In a statement recommending Energees' offer, the Regal board said it believed the bid "provides greater value and certainty to shareholders than the company remaining an independent listed entity at this time".
However, Heamoor later said it was considering a bid, adding it had been in talks with the Regal board regarding a possible cash offer.
It
