Factual error: The rabbits are underneath the landrover, and they get shot out the back whilst holding on to the axle. Land rovers have an enclosed axle with a hub enclosing the diff, so this would not be possible.
Continuity mistake: Tom grabs some explosives out of the burrow, and as he stands up some have appeared in his pockets.
Other mistake: When Tom is choking Peter, for a moment, Peter disappears.
Factual error: Thomas McGregor asks at the station in London for a 'round trip' ticket to Windermere. It's called a 'return' in Britain and no British person would ask for anything else.
Other mistake: When we see the 4x4 driving to the hardware store the truck isn't reflected in the shop windows even though it should be.
Other mistake: On the way to the river the rabbits can pull the tail gate up from inside the back of the 4x4 and it closes and stays shut. However in the shop, Tom is shown that a clip on the outside of the 4x4 has to be bolted to keep it shut.
Continuity mistake: When Mr McGregor has died, all the animals run into his garden and Ms. Tiggywiggle is at the very back. When we see the gate being broken down a second later she is at the front.
Continuity mistake: When they climb the tree at the start the positions of the rabbits change instantly.
Continuity mistake: When Tom uses the binoculars for the first time the strap is draped over his arm. Camera cuts and it isn't.
Continuity mistake: When Peter and Benjamin fall through the trousers, Tom is nowhere to be seen. As they land on the floor Tom is behind the trousers.
Other mistake: When Tom hits the metal light and gets electrocuted, the light comes on. There's no reason for the light to come on.
Suggested correction: It is possible that light reacts to sound or movement.