Negotiations between manufacturers and retailers are tough in every market but in France, due to the legislation governing the sector, there is are extra considerations. Throw in the often vocal nature of French farmers, suppliers and grocers - and the recent rise in commodity costs - and the tensions can reach teh public domain. Reporting from French farm show SIA, Peter Crosskey gives a flavour of the debate as suppliers and retailers look to nail down their price agreements for the coming year.