SHARES in Collagen Solutions fell almost 15 per cent yesterday after the group said first half revenue would be down on last year.

The group, which makes its collagen-based biomaterials at a site in Glasgow, said that while “the quality and scale” of its sales pipeline was at its highest level to date, first half revenues have been impacted by what it called “revenue recognition” issues. These, it said, would flow into the second half.

Revenue is expected to be £1.86m, down from £1.89m

Jamal Rushdy, chief executive says: “We remain positive on the long-term prospects.”