Royal Mail shares surge as seller Hargreaves Lansdown buckles under weight

Royal Mail shares have surged this morning, rising as high as 456p after a debut of 450p, soaring above the offer price of 330p.

Share seller Hargreaves Lansdown has seen its systems crash trying to deal with the sheer volume of trade; investors have taken to social media platform Twitter to air their frustration.

More details and analysis on the liveblog.