Lobbying from the London Cycling Campaign (LCC) has paid off, with Transport for London and the Greater London Authority adding "tough conditions to contracts with all their transport and freight suppliers".
All contractors apparently now must sign a services agreement in which "approved driver training" is stipulated.
According to the LCC, this training should deliver the syllabus of TfL's "Safe Urban Driving", which even includes lorry drivers riding bicycles on London streets in conjunction with a qualified trainer.
The LCC added:
"We're delighted TfL has responded to public concern over the number of cyclist deaths involving lorries, putting in place a mechanism that means at least the lorry operators they employ will pose less of a danger to walking and cycling.
"What remains to be done, and this is a significant challenge, is to make every London lorry operator meet the same, more stringent standards.
"We were disappointed only five borough councils have provided on-bike training for their lorry drivers, and some of these councils only provide it sporadically.
"We've written to all council leaders insisting they only use the safest hauliers, drivers and lorries.
"We'll be reporting back soon which councils have taken this Safer Lorries, Safer Cycling pledge, and which ones haven't..."