Do you remember the 'I'm backing Britain' campaign in the late 1960s?

I'm Backing Britain was a brief patriotic campaign aimed at boosting the British economy.  It flourished in early 1968 when economically the country was in quite a bad way, in fact so bad that the pound had been devalued the previous year in an effort to make exports from this country more viable.
The I'm Backing Britain campaign started spontaneously when five Surbiton secretaries volunteered to work an extra half an hour each day without pay in order to boost productivity, and urged others to do the same. 
This invitation received an enormous response and a campaign took off spectacularly, becoming a nationwide movement within a week.  

Unfortunately, when the good times returned people's resolution to back Britain waned somewhat.  
Instead of eating local seasonal food, we became accustomed to enjoying all foods all year round.  
Often these foods were imported from many thousands of miles away, when we could have enjoyed locally grown food, but only in season.  
I think that if we eat something all year round then we don't appreciate it so much as if we only are able to enjoy something for a short spell each year.  
And somehow following the seasons brings a rhythm to the year, which is more comfortable, and keeps us in tune with nature.  
More importantly, local foods in season taste so much better.

To bring the idea of I'm Backing Britain more up to date, here are the top four reasons to buy British food ...

1. Buying food and drink that has been produced in the UK not only adds to the overall growth of the nation's economy, it also keeps smaller, more local businesses alive.
2. Farmers help maintain the beautiful countryside: from protecting wildlife to repairing fencing and hedgerows, the scenery we enjoy is crafted largely by them.
3. Supermarkets that use British farms are able to build up personal relationships with their suppliers and visit their farms on a regular basis to ensure top quality.
4. Many people think locally produced food tastes better.  Crops are picked at their peak and there's no time wasted having produce flown or shipping in from overseas.

Also see: 
http://www.bbc.co.uk/news/magazine-15551818
and
http://britishfamily.co.uk/im-backing-britain/

This is a table of when to buy home-grown food: