Business leaders and tourism industry insiders in the United Kingdom have spoken out against delays and difficulties in British visa processing, despite signs of improvement ahead of the London Olympics.

They suggest that the UK government learn from other countries to make its visa application process simpler and clearer.

"We are very concerned about that, because we believe there could be a lot more Chinese visitors coming to the UK, with further enhancement and improvements in the processing of visas," said Mary Rance, chief executive of UKinbound, a trade association which represents the interests of Britain's inbound tourism sector.