The TV presenter achieved 17 podium finishes at the Isle of Man TT Race during his career as a motorbike racer, and he has become known for his pursuit of speed records.
In 2016, he made a bid to break the two-wheeled world land speed record, and he succeeded in setting world records for the fastest tractor, speediest soapbox, and fastest speed on a gravity-powered snow sledge.
The first speeding offence was on 15 July in Leicestershire while riding his Honda motorbike along the A50 at just before 17:00 BST.
The second offence happened at 09:24 on 19 March, when Martin was riding the same bike on a temporarily speed-restricted A43 in Brackley near HS2 roadworks.
“He apologises to the court for his offending,” a partner at law firm Chattertons wrote on Martin’s behalf.
“He will not be opposing the totting up six-month disqualification.”
