The attempted takeover of British pharmaceutical giant AstraZeneca by its US rival Pfizer would create one of the global drug's industry's largest ever deals.
The US pharmaceuticals group has confirmed it renewed contact with Astrazenca following a failed attempt earlier in the year to start talks on a multi-billion pound takeover.
Lord Sainsbury, the billionaire of supermarket fame, said that under no circumstances should any takeover deal be allowed to go ahead.
US pharmaceutical giant Pfizer has made a second attempt to takeover AstraZeneca. Here are some of the main points of the possible deal.
How a tie-up between two of the world's biggest pharmaceutical firms would affect Britain.