BusinessHealthcare Markets TDL flat in 2017 By Maria Davies - 27th February 2018 FacebookTwitterPinterestWhatsAppLinkedin Pathology provider The Doctors Laboratory (TDL) reported a 2% increase in turnover to £83.9m for the year ended 30 June 2017. Cost of sales increased… You must be a HM Subscriber to view this content. Login » Subscribe Now »