Complex sentence: The move was testing the water for a complete change over, following in the steps of a number of other British broadsheets, including The Times, The Independent, and The Guardian that had recently ditched the broadsheet format in favour of smaller page sizes.
Split into simpler sentences: The move was testing the water for a complete change over. This would follow in the steps of a number of other British broadsheets, including The Times, The Independent, and The Guardian that have recently ditched the broadsheet format in favour of smaller page sizes.