All Creatures Great and Small tour attracts mostly American tourists who are overwhelmed by Yorkshire Dales scenery and tour guide shares thoughts on actors Nicholas Ralph and Rachel Shenton

Tim Barber, owner of Real Yorkshire Tours, shares his thoughts on what makes the Yorkshire Dales landscape an attraction for overseas visitors.

The most popular tour is of the Channel 5 series locations. His clients mostly include American tourist who 'burst into tears' with emotion when they visit Yorkshire.

On a few occasions, he has bumped into the cast including Nicholas Ralph who portrays James Herriot and Rachel Shenton who portrays Helen Herriot.