The Bayeux tapestry is so fragile that transporting it risks irreparable damage, French experts have said, as a petition urging Emmanuel Macron to reverse a catastrophic decision to loan the unique embroidery to Britain passed 60,000 signatures. France's president declared in July that the nearly 1,000-year-old, 70-metre-long wool-on-linen artwork, which depicts William the Conqueror's victory over King Harold II of England at Hastings in 1066, would cross the Channel next year.