By Elliot Gulliver-Needham Do-it-yourself investment platforms like AJ Bell, Hargreaves Lansdown and Interactive Investor have been caught blocking the purchase of investment trusts, at a time when the sector, and wider UK markets in general are battling to attract investors. This, along with other problems for the industry, risks creating “another Woodford” if asset managers start to shy away from using them and towards less suitable investment vehicles, warned Jock Glover, strategic relationships director at Square Mile Consulting and Research. The investment trust industry is already in a r…