Twitter explains the strange tweets in your timeline

Tweets from people you do not follow may now appear in your timeline as a result of changes implemented by the social-networking site Twitter.

Twitter has been trying out changes to the way the timeline works on the social-networking site Credit: Chris Ison/PA Wire

"When we identify a Tweet, an account to follow, or other content that's popular or relevant, we may add it to your timeline," Twitter said in a statement.

Its stated goal is to make Twitter users' timelines "even more relevant and interesting".

Another change that has been tested and now implemented is that favourited tweets will appear in your timeline, alongside your tweets and re-tweets.

The changes have so far proved unpopular with some users taking to Twitter to vent their frustration.