Merlin Entertainments is the second largest company of its kind in the world after Walt Disney, operating 99 attractions in 22 countries.

The share offer, which will see 20% of the company pass to public investors, is accessible to smaller shareholders with a minimum investment stake of £1,000.

Investors will also get a one-off 30% discount on certain entry passes for Merlin’s theme parks.

The business has a turnover of £1bn a year and is thought to be worth some £3bn.

Sir John Sunderland, non-executive chairman of Merlin, said: “Over the past decade Merlin has become a truly impressive business, driven by a committed and dedicated management team and backed by supportive shareholders.

“I have been impressed by the significant growth that Merlin has delivered as a private company. But there is more to come and I believe Merlin has a very promising future as a publicly listed company. I, along with the rest of the Board, am committed to working with the executive management team to ensure the continued success of the business.”

The company, which was formed in 1999, says the number of visitors to its parks has grown by 11% a year since 2008.

Merlin owns well-known sites including Legoland, Thorpe Park and Chessington World of Adventures.