SKY News has been criticised over a graph showing the results from the latest Opinium poll on Scottish election voting intentions.

The Opinium survey puts the SNP’s constituency support at 51% and list backing at 41%, projecting a majority for the party with 67 seats in total.

The poll, carried out for Sky, also put Greens support on 8% - projecting Lorna Slater and Patrick Harvie will return eight MSPs, three more than their current total.

The graph used to present the findings came under fire online, with economist and former MSP Andrew Wilson branding it “odd”.

The National:

Screenshot from Sky News

The bar graph shows the SNP on 51%, Tories on 23%, Labour on 19% and LibDems on 7% - but the size of each bar is not proportional at first glance.

Going by height of each bar alone, the LibDems look to have about half the support of the SNP, with the support for each party appearing tighter than the numbers indicate.

However above each party name and percentage there is a shaded section, which is proportional in size.

Twitter user @peterdempsie produced a version taking the full length of each bar into account and demonstrating how the graph could be made fully proportional.

“Fixed it for you,” he tweeted at Sky News.

Frustrated independence supporters discussed the graphic online. “How odd,” wrote Wilson. “These Sky News graphs are just plain embarrassing,” wrote Grant McKenzie.

Filmmakers Phantom Power shared the image and asked: “Is Jo Swinson doing the Sky News graphs?”

“I don’t think they’re outright misleading, but they do look absolutely awful, and I can see why someone would be a little confused by them,” replied Lloyd Warburton.

READ MORE: Scottish election poll: SNP on track for a majority government

Professor Paul Middleton also stepped in to explain the issue. “If you look carefully, the whole thing isn't the bar chart,” he tweeted. “Every party has the same size ‘box’ at the bottom, and then the bar (which is proportionate) is on top of it.”

Sky News has been contacted for comment.