Students preparing to enrol for the course were horrified that university bosses thought they could get away with the huge cost. The average for a Part III programme is in the region of £1,400.
It is understood that some of the students warned Westminster's authorities that they would enrol with the Bartlett if the fee wasn't brought down.
One of the potential students, Matthew Swinhoe, the general manager at the Hutchinson Studio, told the AJ that the enrolment process soon became rebellious.
'When we arrived to enrol there was a very long queue but people appeared to be holding back a little bit because they were so annoyed at the cost,' Swinhoe said.
'There was a lot of chat about it and then suddenly there was a revolt and a refusal to pay. Everybody said it was unreasonable and made a bit of a stink.
'We said we'd go to the Bartlett instead unless they did something about it. In the end, they did,' he added.
And Swinhoe also has the support of his boss Maxwell Hutchinson, a former president of the RIBA, who described Westminster's behaviour as 'shocking'.