When Connie and Rita O'Grady return to their co-workers from their first meeting, Rita hands her handbag to Connie to hold while she climbs on a table, gets everyone's attention, then announces loudly, "Everyone out!" She climbs down and shakes hands with co-workers without her handbag (Connie is holding it), then suddenly she has her handbag looped on her shoulder, then it's gone and Connie is holding it again, and we never see Connie hand the handbag back to Rita.
A Mk1 Cortina comes off the production line, but in an interior shot, the two women are sitting in a MK2 cortina GT.
The Union chiefs announce their loyalty to the Communist Party yet communists were banned from holding office in the TGWU at that time.
The low rise block of flats that Rita and her husband live in has a wood and toughened glass communal security door, which were not fitted in the borough until the 1990's.
Whilst the interior of Lisa Hopkins' 1600E Mk 2 Cortina was in fairly good shape for a 42 year old car, it was pretty shoddy for a brand new car which it would have been at the time the film was set in.
Ford's US boss mentions the Socialist Workers Party, Workers Revolutionary Party and Revolutionary Communist Group but none of them existed in 1968.
In the shot of the housing blocks, a satellite dish is visible on the roof of one.
A Corsair is shown among the Cortinas leaving the factory on a transporter. Corsairs were only manufactured in Dagenham after 1969. Before that, they were manufactured in Halewood.
In the bar after the Eastbourne conference when Sandra is at the bar, a modern set of beer pumps is visible with a plastic Guinness pump handle prominent. (At about 1hr 26mins)
When they are returning home from the party, a modern CCTV camera can be seen atop a large pole.
In the opening titles a caption states that "In 1968 there were 55,000 men employed at Ford's Dagenham Factory", yet in the exchange between Mr Tooley & Barbara Castle, Tooley states that Ford employs 40,000 workers in the whole of the UK.