I have always thought it was a shame I couldn’t access our shared calendars on my iphone.  There must be a solution?

Here it is;

Log in to your Google account then follow this link to choose the calendars you would like to sync to your iOS device.

https://www.google.com/calendar/iphoneselect

Easy eh?

N.B I needed to delete my gmail account from the phone as I had configured this before the new gmail setup option was available.  This was really easy.