Conservative MPs have been given training to brush up their Instagram skills, with advice suggesting they use the social network to show the electorate that they are “real people”.

The Instagram training session was offered in January, part of an initiative by the party chairman, Brandon Lewis, to combat what is perceived to be Labour’s advantage over the Tories on social media output and following.

Tory MPs were told that they could reach a younger voting audience through Instagram than via other social media and marketing platforms. They claim that 35% of the people who follow @conservatives on Instagram are aged between 18 and 24.

Instagram was described to MPs as “a chance to show you are a real person who people can relate to or be inspired by – the goal is to do both.”

The trainers said photographs of objects could help Conservative MPs tell stories about who they were supporting or what they were working on.

MPs were warned against using too many generic graphics or posting images that did not feature human faces.

During last year’s conference season, the party was widely ridiculed on social media for a series of images posted to Instagram that showed ministers and other senior Conservatives in awkward behind-the-scenes poses.

The defence secretary, Gavin Williamson, has attracted mockery for his Alan Partridge-esque Instagram posts. He once posted a picture of a Land Rover with the caption: “In many ways when I look at my #landrover I think it epitomises everything that is so fantastic about #greatbritain.”

The Instagram training documents, seen by the BBC, encouraged MPs to use historical events and anniversaries as themes for celebrating the Conservatives. It was suggested they use events such as the release of the film to make links to Sir Winston Churchill, for example. The official Conservatives account has taken to participating in #tbt – “Throwback Thursday” – by posting archive content about Tories from the past.

Another example of good practice shown during the training was the use of letters from constituents to tell stories about Conservative policy. A post featuring a letter to Matt Hancock MP about ticket touting was highlighted. It is not clear from the presentation slide alone if trainers addressed whether MPs should get permission before uploading private correspondence to the social network even when anonymised.

In other parts of the presentation, MPs were encouraged to respond to the comments underneath their Instagram posts, and Sajid Javid was praised for the complex composition of one of his Instagram stories – short collections of video, text and images that are available for people to view on Instagram for 24 hours.

Tories were encouraged to do their posting later in the day, when people are checking the service during leisure time in the evenings, which they were told was an ideal time to engage them.

It has not been all bad for the Conservatives on social media. Theresa May’s social media team were praised when, after a cough ruined her set-piece speech at the Tory conference, they sent a tweet featuring a packet of cough sweets.

The Conservatives’ Instagram account has fewer than 20,000 followers, while 50,000 follow . The social media network, which is owned by Facebook, has more than 18 million users in the UK.