LONDON (Reuters) – Designers turned to nature for inspiration on the opening day of London Fashion Week on Friday, showcasing a collection of sheer silk dresses, delicate embroidery and elegant show pieces all featuring a floral-inspired theme. Britain's capital took over the baton from New York, which wrapped up its week with sparkly dresses and bold geometric prints, with a pared-down color palette of fresh pastels and faded dip-dyes. …