Companies House has admitted it has had to cope with a backlog of delays following dramatic changes to its processes last month. Accountancy practitioners have complained of lengthy delays in filing registrations and setting up companies. A Companies House spokesman said: 'We currently have a backlog of incorporations waiting to be processed, partly as a result of technical changes and partly due to a general unfamiliarity with the new requirements.' At the root of the problem are changes that were introduced as the final element of the Companies Act 2006 on 1 October. These include the replacement of all existing forms with new ones and the addition of new features to electronic filing of information. The time for filing accounts has also been reduced from 10 months to nine.Companies House said new incorporations was an area 'where customers have felt the effect of the recent changes'. The spokesman said there had been a challenge for formations agents - those who set up new companies - in meeting the new standard requirements of the Companies Act. 'The process is taking more time than expected for our staff to complete,' he added. However, Companies House says it has 'substantially increased' the size of the team undertaking incorporation work to clear the backlog as quickly as possible. On one day last month, there was a backlog of 2,000 which Companies House was aiming to clear within a fortnight. Over 165,000 documents had been registered by 12 October from the start of the month.