The Bannatyne Group will invest £1.8m (US$2.4m, €2m) in its Ingleby Barwick health club – the company’s first centre, which opened in 1997.

The investment marks the 20th anniversary of the business, which has been built up to a portfolio of 69 sites across the UK.

CEO Justin Musgrove said: “Ingleby Barwick will always be special as the first club opened by Duncan Bannatyne OBE. The business has come a long way in 20 years and this major investment is testament to the ambitions of the business.”

The redevelopment, which is expected to be completed in April 2018, will see the creation of a luxury spa, studios for group cycling and mind and body classes, and new changing rooms and showers.

The spa will have six treatment rooms, and manicure and pedicure stations for both members and spa guests.

Improvements also include a new poolside relaxation area, as well as a café bar with a late licence and sports broadcasts, a soft-play area and an outdoor patio section.

Musgrove added: “The addition of a Bannatyne spa is fantastic news for the health club and the local area. It will support our focus on holistic health and wellbeing and enable people to fulfill their desire for healthy lifestyles based on a blend of exercise, relaxation and rejuvenation.”