Australian boat race protester Trenton Oldfield will be allowed to stay in the United Kingdom after an immigration tribunal judge said the activist had made a positive contribution to British society.

Mr Oldfield has successfully appealed a decision of Home Secretary Theresa May to deport him on the basis his presence in Britain was ‘‘not conducive to the public good’’.

Immigration tribunal Judge Kevin Moore will make his official determination within 10 days but told Monday’s tribunal hearing that he would be finding in favour of the 37-year-old.

‘‘It would be my intention to allow your appeal,’’ the judge told Mr Oldfield in London.