Could the H5N1 virus have been passed from areas where there have been outbreaks of bird flu in Hungary to the Bernard Matthews poultry plant in the same country?

There were two outbreaks of H5N1 in southern Hungary in January. Athough Mr Matthews' Saga food complex is more than 100 miles from the nearest outbreak, Hungarian authorities are investigating whether poultry lorries travelled beween the plant and the infected area. Mr Matthews insisted his paperwork showed there was no trade between his plant and affected areas.

How could the the virus have jumped from Mr Matthews' processing plant in Suffolk to the adjacent live turkey sheds?

Government inspectors are working on the theory that food waste could have been lying around in processing plants and that this could have attracted rats or birds, which then carried it into the live bird sheds.

What are the implications for human health?

There is no evidence that the virus can live in cooked, processed food because cooking infected meat kills it. The authorities will want to know if any raw meat got into the human food chain.

Is this the end of the episode?

Unlikely. Poultry is a global business and there will always be a risk of the disease being passed from one country to another.