You've missed my point. The harmonising of standards happened after we joined the EU, and the costs i refer to were associated with changing our product to comply with the revised harmonised standards. Yes, many of the standards were based on existing British standards, but unsurprisingly also incorporated bit of various European countries standards which we then had to comply with. After the standards were harmonsied there were a series of changes to correct problems with new standards. One of our products requires notified body approval so not only did we incurr the cost of redesigning the product, we also incurred the cost of reassed compliance at each stage.
Your point was that EU red tape cost nothing. My point is that EU red tape did incurr costs and didn't actually drive up the quality of the product. What has happened since then was not part of my point.