A driver caught doing 122mph on the motorway claimed he was travelling back to England after getting a haircut in Wales.
Police caught the 29-year-old speeding near Junction 23 of the M5 in Somerset on Thursday.
Avon and Somerset Police tweeted: “Officers stopped a car driving at 122mph near J23 of the #M5 yesterday. The occupant was travelling back from Wales after getting a haircut.
“A 29-year-old man was arrested on suspicion of driving while unfit through drugs after failing a roadside test. Enquiries ongoing.”
Hairdressers and barbers in Wales reopened for appointments on Monday, but they're still closed in England.
Coronavirus restrictions state it is currently illegal to travel outside your local area in the UK.
On 12 April at the earliest, the government plans to allow shops, hairdressers, nail salons, gyms, outdoor attractions, libraries and community centres to reopen in England.
Pubs and restaurants would also open outdoors - with no curfew and no requirement for alcohol to be accompanied by a "substantial meal", as was the case in the winter.
In the third stage, on 17 May at the earliest, two households or groups of up to six people will be allowed to mix indoors, and limited crowds will be allowed at sporting events.
Pubs and restaurants will open indoors, as well as entertainment venues such as cinemas and theaters. Hotels would also reopen, as well as sports stadiums subject to capacity limits.
Then, in the fourth stage on 21 June , the government aims to have "removed all legal limits on social contact": including on weddings and other life events, opening the final closed sectors of the economy such as nightclubs, and lifting restrictions on large events and performances.
On Friday, the Welsh government published an updated control plan, saying the Kent variant of the virus - which caused the UK's winter crisis of record infections, hospital admissions and deaths - means ministers must adopt a “more cautious approach” to lifting lockdown restrictions.
Watch: How England will leave lockdown