All UK businesses and companies must use day/date/year convention

Anyone using a British companies services has the right to have their data provided in the mother-tongue with regards to convention of dates. This sounds Techy and maybe not so important however, it can and does affect people and companies finances.
Here is what I am going on about........6/1/2015 is and always should be 6th January 2015 if you are using a British business or companies services.
It is NOT 1st June 2015 which is what some other countries use/cultures.
This ignorance of locale can and does cause major financial errors, confusion and disruption.
The compromise version is the month being written in words EG: 06/Jun/15 or Jun/06/2015. I don't think is good enough. As Boris says, if you go to Rome, you will be expected to at least fit-in, at most integrate.
When I downloaded some major banks statements last year, the dates were in US convention not British (English). This bank is a major very old institution. I read the dates correctly but they were in US convention and lead to issues.
This is also cultural erosion. It is not acceptable to have this change unmanaged.
If you have been affected by reading a date incorrectly that has had major impact on your life or your family please get behind this campiagn and let's start at the top.
I have already discussed it with the Banking Ombudsman but it was pushed aside. This is NOT a 'non-issue'. It is as much about 'stealth-change' and NOT involving or asking opinion of the 'average Jo' as much as being a flaw.

I have gone on enough now!, please have a serious think about joining this campaign and let's try and reduce cultural erosion and enforce Technical locale conventions.

Thank you!

NB: Here is a screenshot of computer settings for English (United Kingdom)
http://i.imgur.com/7pZnG2t.png