star has allegedly been arrested for drug-driving and having false number plates.
Jack, 31, is best known for with then-girlfriend .
The dad-of-one is also said to have been held on suspicion of driving without insurance and careless driving.
Jack was travelling at ‘high speed’ when he was stopped by police near his home in Kent.
According to , he was released under investigation until November 26.
The outlet adds that a source close to Jack insisted he was using private plates, not false ones, and that the TV personality denied using drugs.
Meanwhile, his solicitor Conor Johnstone told the paper: ‘Mr Fincham has not been charged with drug driving and denies any drug consumption whatsoever.
‘There is no evidence at this stage that Mr Fincham drove whilst over the legal limit and we are hopeful that his blood results will prove the same.’
The alleged arrest comes weeks before Jack is supposed to .
The spin-off show was confirmed this month by ITV and will feature Love Island’s .
The All Stars show will be filmed in South Africa in a ‘luxury’ villa, although it has not been confirmed if it is the same nestled in the country’s wine-making region used for the winter series.
The boss of Love Island’s production company, Lifted Entertainment, admitted he ‘couldn’t wait’ for the spin-off as he teased viewers what’s in store.
Mike Spencer said: ‘It has been rumoured now for a while but we are thrilled to finally confirm that we are making Love Island: All Stars early next year for ITV2 and ITVX.
‘It’s set to be a must-watch series seeing some of your favourite Islanders from across the years heading back to the stunning South African villa to once again “graft” as their search for love continues. I simply can’t wait.’
Metro.co.uk has reached out to Jack’s reps for comment.