Obviously they had toughened safety glass that was not laminated, for exterior ground floor installations in the UK for security purposes it is recommended that laminated glass is used. my last ones were also laminated and were put in when the house was built. when i breaks it is a lot harder to remove and break in.
if you want to check the Laminated glass Kitemark code in the UK is bs en 14449 and all my windows and door on the ground floor are laminated. but my upstairs windows are just toughened glass so when broken will allow easy access.
but my ground floor windows and doors would take a lot more effort. but thats why i said toughened glass patio doors manufactured in the last ten years as all external ground floor patio doors fitted should be laminated glass installations, but maybe they check the kitemark to see if they can get easy access with a diamond tipped hammer