Continuity mistake: James is counting pennies on the aptly named counter of the store. Take a look at the pile of money; there's one coin in particular which stands out, on top of the other flat ones, tilted to the left. A couple of shots later the coins slightly changed position, which is easy to tell noticing the change of position in that coin. (00:04:10)
Continuity mistake: After the overdose in the car, James meets his social work to try and start again. He puts his paper cup on the desk. He drinks then from said cup. When she stands up, James' cup is fuller than before. (00:08:30)
Factual error: In the montage showing James busking after committing to the program, he picks up his guitar when it gets dark and tries to find shelter. On the side of a London bus, you can spot the ad for "The Hunger Games; Mockingjay - Part 2", a movie that came out in 2015. The happy ending of this movie takes place in 2012. (00:09:55)
Deliberate mistake: At least twice the protagonist uses the bus n*38 who brings him in and out of his new neighbourhood and that has on its side an ad banner. The banner pays homage to the movie Roger Spottiswoode directed before this one (in 2014, so it'd be an anachronism given this movie's events), but it stands out for not being done properly. The first time we see it it does not have proper 'credits', copywrite, tagline, to the point that it's not possible to understand what does it advertise, the second time it does have some writing. The title quoted is also wrong, since it's written as "The Midnight Sun", while the title before re-release was "Midnight Sun." (00:11:40 - 00:38:30)
Continuity mistake: The quantity of Kellogg's cereals in front of the cat's paws when James spots him vary between shots. (00:15:00)
Continuity mistake: James strokes the cat he just put on the counter in their first meeting. As he crouches, he puts his left hand above the right. When their eyes meet in the next shot (where incidentally the cat also looks right into the camera initially), the hands are swapped. (00:15:55)
Continuity mistake: During James and Bob's first meeting, in one early shot the box of cereals is on the counter next to the cat, while in the rest of the scene it's not there, nor it is supposed to since James gave his furry friend a lift but never picked the box up from the floor. (00:16:00)
Factual error: James is playing his guitar outside a station. Before the frontal shot that identifies it as Covent Garden, there's a street poster for the musical version of "Matilda." The play was already in existence in the movie timeframe, but the poster is in its "Believe the hype" version that is post 2013. The movie ends in 2012. (00:19:55)
Factual error: When James spots his dad (Anthony Head) and stops him in the middle of the street, they have a brief chat in front of a big marquee advertising "Charlie And The Chocolate Factory - The Musical." First represented in 2013, with the movie ending in 2012. (00:20:50)
Continuity mistake: Inside the vet's waiting room, James gets ticket 62. Not too bad considering in close-up the digital display shows they are serving patient 57. But after half an hour passed, in the background before he says "Bob, look, it's the month of the cat" the counter is at 51. (00:26:20)
Continuity mistake: When James is on the bus with Bob, he is holding him with his hand positioned in front or behind Bob's front leg, depending on the shot. (00:39:00)
Factual error: James makes a leashed Bob hop on his back. When he announces "This is Covent Garden", to the right there's a new store getting set up; it's the famous international stationery brand Kikki K, which opened for the first time in England in late 2015. The movie is supposed to happen years before. (00:41:00)
Continuity mistake: During the first performance with the cat, singing "Satellite moments", a man in a brown sleeveless jacket and sporting a beard approaches James holding a shopping bag in his right hand. In the close-up of the cat he is bending to deposit the coins he had in hand, but his bag moved to the left hand. (00:42:30)
Continuity mistake: The evening that follows the first successful performance, James opens a can of food for Bob. He puts the can to his left, but in the next shot the can is on the opposite side of the table, to Bob's right. (00:45:30)
Continuity mistake: At the end of James' performance of Silent Night, the cat lady hands him a can of food. The can turns around in his hand at the cut. (00:48:00)
Character mistake: It happens in real life too, but when Betty makes the "I'm a level 4 vegan; I don't eat anything that casts a shadow" joke, she misquotes The Simpsons' episode where the quote originated. That'd be level 5. (00:48:40)
Continuity mistake: Throughout the conversation with Betty after Baz's OD, Ruta Gedmintas' hands/fingers change position on the cup between shots. (00:53:00)
Continuity mistake: James is eating the non-Christmas lunch with Betty; he says "I'm tofu, and I'm inedible", and she laughs. In these two shots, she has different food on her fork. (00:55:30)
Factual error: James has a meltdown right after New Year's Eve, and to try and get his life back he turns to the good fellas at "The Big Issue", magazine that famously offers an opportunity to the homeless. The issue they give him to sell has Tom Jones on the cover and the title, appropriate to the theme, "What's new, Pussycat?" Problem is, not only it's an issue from 2015 (posterior to the events of the movie) but it's also from October. The two posters we see in the office are covers from early 2012, so those do instead fit perfectly in the timeline. (01:07:00)
Other mistake: After a month of suspension, James can finally sell again The Big Issue. The issue he carries in the street though, is issue 1174, from early October 2015. Besides the anachronism, the first issue he was selling, well over a month before, was number 1175. (01:16:00)