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Browsers made the Internet usable for the general population. The Internet as we know it would have remained a network for academia, governments and large corporations. Smartphones would not have been developed. Without a reason for everyone's homes to be connected to a high speed network, TV would remain the remit of cable and satellite broadcasting - no streaming services.
From memory, I think the road bends just before the gates so if you missed the bend you would end up driving into the gates.
Incidentally, the grounds are surrounded by an anti tank fence made out of old railway line yet there is a public footpath through the grounds across the driveway.