Date format changing desktop to web

I have a dashboard that when publishing to web the format of the date in the slider changes. 

Example on desktop:

The date is in "uk' format, DD/MM/YYYY

but when published the same slider shows in USA format when acessing it on the web:

Strangely on both other formats such as list show "uk" format:

The original date is of the format YYYY-MM-DD, ie 2017-01-31 which is "transformed" on input using locale (uk).  Modelling setting then used to get the required display format.

Seems strange that on the web, list is UK format, select between/before/after is USA format, any ideas ?

Thanks!