It's Fiat 126 wiper blades you put on the Metro or Mini arms. Usually the Bosch blades have sufficient adaptors to attach them to the arms. Works perfect, the only thing I still have to do is to change the wiper mechanism so the blade doesn't run over the window rubber (what they all do).
Found it... on a Midtec Bronze info sheet (red A reg in the photo). It says Mini rack, but 126 arms & blades.
If the arms a shorter, or more cranked, the end of the blade nearest the wheel box will run off the screen: unless you fit them to clear, then they'll run off the screen in the park position.
Just an update eurocarparts are doing a 30% off all wiper blades with the code; OILSPILL30 (looks like you need to spend £9.98 to qualify for this offer...)
If you don't fancy purchasing something to round up your basket to 9.98 to qualify for the offer the same part is available here for cheaper (though it is the same company!); http://www.carparts4less.co.uk/cp4l/p// ... &0&cc5_167