The sites will be the first to include a new template that Trinity has been developing for its larger newspaper titles.
Nine-months testing, claims the company, has assisted in developing a format that is more 'user friendly' and will ease integration of Web 2.0 features and increased multi-media storytelling.
The websites for Trinity Mirror titles the Journal and the Evening Chronicle, in Newcastle, and the Middlesbrough-based Evening Gazette will similarly be relaunched in the coming months - to be followed by titles in South and North Wales, Yorkshire and Scotland.
"We are now well on our way to achieving our goal of publishing the leading sites in our local markets, complementing the strength of our market-leading print titles," said David Black, Trinity Mirror’s director of regional digital media, in a press statement.
"The significant upgrade to our sites will further improve our online proposition and gives us a tremendous platform to grow our online reach and revenues locally."
In preparation for the overhaul of its sites, Trinity ran a weeklong training programme in video journalism and a series of one-day multimedia workshops to improve journalists' skills in the North West region.
More than 70 journalists attended the workshops, which will now also be rolled out across the country.
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