Hugh,
Groceries / Bread etc. in the foreign lands I have found only cost a lot more if you insist on buying the imported English Brands - you have to pay for the transport costs - If you buy the local goods they cost a lot less.
Several years ago we had neighbours - who when she went back on a visit to the UK - went with a case-full of presents for her grand children - she had her own clothes at her Daughters in the UK - on her return she brought back English Foodstuffs ? One visit she brought back 6 Cabbages - because they tasted better than the Spanish ones


Another time on the run up to Xmas - she teased me from November onwards on her return - about something she had brought back as a special treat for our group Xmas Dinner - When they arrived with their contribution to the meal - the surprise turned out to be Fresh Brussel Sprouts - because in her words ' You cannot get them here in Spain '.
She was most surprised when I pointed out that we had already got Brussel Sprouts cooked - bought only the day before fresh from the Market where they must have had tons of them - and ours were fresh - whereas hers had been deep frozen since the first week in November ??
As regards Pensions abroad - as I have stated only this week in another section - our Pensions last year - I do have to record them accurately for our Spanish Tax returns - were thanks to the exchange rates { which are now worse } 3,600 less than they were in 2007 - so our disposable income has reduced dramatically - another reason why we do not buy imported { English } foods.
A new Iceland store has recently opened in our area - it had been open for about 6 weeks before we ventured in - nearly everything is marked with UK prices on the packets - but shown also & charged in uros at an exchange of approx 1.4 so an Item priced at £ 5.00 would be charged at 7.00 - In some cases the exact same brand can be bought in Spanish supermarkets for less - and a Spanish equivalent for less still.
We now always call in whenever we are out shopping - but just to see if there are any bargains in the ' out of date section ' but even these have to be looked at - even the reduced price is more than we would normally pay in the Spanish stores - our usual purchase from this section are Pork Pies { Checked the ' Sell By ' date on Friday } they should be moved today - these are an item the Spanish do not make.
I have stood behind people at the till - and quite honestly they have been charged more for one carrier bag of foods than we would be charged for a weeks shop in Mercadona which is the largest Supermarket Chain out here - and lots of folk regard them as expensive !
We use them because the quality is good - similar to Sainsbury's or Morrison's in the UK - there are cheaper supermarkets that are not much different than the same kind of groups in the UK.