It this video (during minute 1:50 and then 7:10) you can hear:
We've just arrived to the Shetland Islands.
We have just arrived to St Ninian's Isle.
I've always thought that only 2 prepositions can be used after arrive - either at or in: We arrived at the hotel. I should arrive in London tomorrow morning.
So, what would to after arrive be - just bad grammar? Or could it be something regional?