PRE-orders for the sixth book in the Harry Potter series have "substantially exceeded" expectations, the title's publisher Bloomsbury said today.

The latest instalment - called Harry Potter and the Half-Blood Prince - is not due for release until July 16 but already looks certain to build on the phenomenal success of previous titles from author JK Rowling.

Bloomsbury did not disclose sales figures but said demand for the forthcoming hardback release would help leave 2005 profits far higher than hoped. Bloomsbury also announced results for 2004 today, with profits up 6.9pc to £16.4 million.