NATIONAL Accident Helpline, which has its headquarters at Kidderminster, is to float on AIM, the London Stock Exchange’s international market for smaller growing companies. Its chief executive Russell Atkinson said the business will offer an "attractive yield" for investors and the move, which is expected to take place in May, came at a "natural time" in its development.

NAHL Group, whose main trading business is National Accident Helpline, was founded in 1993 and has grown to become one of the largest outsourced marketing services providers to the personal injury market. In the year to December 31, 2013, the group generated revenues of £39.7m and operating profit of £9.8m. It is understood to be looking to raise about £50m through the flotation.

Mr Atkinson said: "We have a long track record of consistent and profitable growth with a highly cash generative business model which we expect will deliver an attractive yield for investors. The legislative changes that were introduced in April 2013 have been embedded and we believe an IPO will provide an excellent platform for the group to take advantage of the significant growth opportunities that this legislation has created."National Accident Helpline said it has invested more than £200m in marketing over the past 20 years and spent £23m in 2013. Since 2010. it has been known for its plasticine 'Underdog' TV adverts.