You asked

Do you have data about the agricultural trade between UK and European countries in the period 1970 up to now or at least 2014; and also the main products that these countries trade?

I saw on your website that you have only the data of the last years, and not the past.

If you could suggest to me some websites that could have this kind of data, that would be appreciated.

We said

The attached data shows the main agricultural commodities traded between the UK and the EU since 1998 (the earliest available datapoint). Unfortunately, we do not compile commodity statistics by individual country; for those statistics, you would need to contact Her Majesty's Revenue and Customs (HMRC) via their email address: uktradeinfo@hmrc.gov.uk.

It should be noted that the HMRC statistics will not match the ONS statistics as HMRC figures measure physical delivery (despatch and arrival) of goods, whereas ONS estimate the value of goods exported or imported when a change of ownership occurs internationally.