The Grand Hotel in Scarborough used to be one of the best in Europe.

Inside Out goes undercover to investigate a hotel which could be bad for your health.

For nearly 150 years, the Grand Hotel has towered over Scarborough's seafront.

It used to be the biggest hotel in Europe, with 12 floors and 365 rooms - one for every day of the year.

But it seems the Grand is starting to show its age.

Presenter Morland Sanders poses as a guest to get the inside track on the hotel's slipping standards.

Armed with a hidden camera, he scours the hotel for signs of disrepair.

Accompanying him is top microbiologist Jim Francis, who has tested many hotels and other facilities for hygiene standards.

He immediately points out signs of dust, damp and mould, but it's the hidden dangers lurking in dark corners that are causing the problem.

Having checked into two separate hotel rooms, Jim and Morland don their white coats and gloves and set about their inspection.

A quick look under the bed reveals several months' worth of dust and Jim even finds a large human toenail clipping lurking behind the bedside drawer.

HOTEL NOT-SO-GRAND, continued