Duck supplier Cherry Valley Farms has added £4.9m to its bottom line after resuming sales to China following a trade ban imposed because of avian flu.

Pre-tax profits at Cherry Valley rose 152.7%, to £8.2m, in the 48-week period ending 28 March 2010.

The lifting of restrictions in sales of breeding stock outside the EU in place during the company's previous trading period had generated a significant margin improvement for the EU-based breeding operations, the directors claimed in their report to the accounts.

Although the group's UK rearing and processing operations had been affected by high feed costs during the period, price increases forced through during the previous period and at the start of this period had also allowed margins to improve, they added.

Turnover fell 3.72% during the period, to £55.7m, but on a like-for-like basis, turnover was up by 4%.