Sheeting, sheeting? These are the latest vogue in 'ship construction sheds'! Build the hulls in here, take down the sheets and launch by mobile crane, simples! They hardly enhance the waterside view of Whitby but I suspect they may not have needed planning consent as 'temporary buildings' so perhaps a neat solution. More interior views on the company's website
Thanks George, also keeps down claims for paint spray damage as well. Neat solution. Swans used similar structures for their warship work in later years.