LONDON (Reuters) -Apple ( AAPL ) was on Thursday refused permission to appeal against a London tribunal ruling that it abused its dominant position by charging app developers unfair commissions.

The Competition Appeal Tribunal (CAT) ruled against Apple ( AAPL ) last month after a trial, finding Apple ( AAPL ) had abused its dominant position by shutting out competition in the app distribution market and "charging excessive and unfair prices" as commission.

Apple ( AAPL ) - which has faced mounting pressure from regulators in the U.S. and Europe over the fees it charges developers - has previously said the ruling "takes a flawed view of the thriving and competitive app economy".

The CAT refused Apple ( AAPL ) permission to challenge its ruling at the Court of Appeal, but the company can still apply directly to the court.