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In the final programme of the series uncovering the construction and engineering skills that went into the building of Britain, Fred Dibnah indulges his personal passion for the achievements of the builders of the 19th century.

At Eastnor Castle in Herefordshire, a young architect called Robert Smirke was commissioned to build a grand house that was as big and impressive as a great medieval castle. As Fred demonstrates, steam-powered machinery made this possible in a fraction of the time - if not the cost - involved originally.

Eastnor also provides an introduction to the work of architect and designer Augustus Welby Pugin, who was inspired by medieval Gothic architecture. At St Giles in Cheadle, Staffordshire, Fred examines one of Pugin's best Gothic works, achieved thanks to one of the finest teams of craftsmen that have ever been seen in the building of Britain. The building with which Pugin is most commonly associated is the Palace of Westminster, where he worked alongside fellow architect Sir Charles Barry. Fred reveals how the two men came up with a building that matched the medieval Westminster Abbey next door, as well as demonstrating how the builders overcame the challenges posed by the riverbank location.

Fred's final stop on this epic journey sees him scaling the heights again, this time inside the Westminster clock tower - the one we call Big Ben - where he reveals what makes the country's best-known clock tick to time and how the huge bell was originally constructed.