When Richard tries to lift the fridge, the rope between the pulleys on the ceiling is not tensed.
Doncaster is not 25 minutes from Bridlington. It's 62 miles, at least 1 hour and 25 minute drive in 2018, so much longer back in 1991.
Richie experiments how long it takes to get the bus station, he returns to the flat after twelve-and-a-half minutes. (Say six minutes, fifteen seconds there and back.)
At the end when Eddie and Voluptua prepare to leave Eddie says "We have but three minutes to go." It took Richie an approximate six minutes to get there, they wouldn't have made it in time.