IPhone/Ipad

click this link 

https://calendar.google.com/calendar/ical/5nj2rulpj7egcdges8rp2sbvcs%40group.calendar.google.com/private-cdde7d6cfbdeb3ee9084b04ffb23366c/basic.ics 

then click subscribe and it will be amended to your calendar 

Android

click this link 

https://calendar.google.com/calendar/ical/5nj2rulpj7egcdges8rp2sbvcs%40group.calendar.google.com/private-cdde7d6cfbdeb3ee9084b04ffb23366c/basic.ics 

this will download the calendar events

click on the file that was downloaded – this will amend it to the calendar on your device 

Outlook on pc

click this link 

https://calendar.google.com/calendar/ical/5nj2rulpj7egcdges8rp2sbvcs%40group.calendar.google.com/private-cdde7d6cfbdeb3ee9084b04ffb23366c/basic.ics 

this will add it to your outlook as its own calendar and is visible in the calendar tab on outlook