The 12ft (3.6m) diameter "spider web" was seen hanging under Stapleton Road railway bridge by Gail Boyle as she drove into work earlier.

"It's a massive piece of crochet... and the nylon cord must be up to an inch thick," she said.

"I've no idea who is responsible, it might be 'yarn bombing', but I crochet and I know that they are proper crochet stitches," she added.

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