[ U.K. ]
eBorders was conceptually botched from the start.
It aimed to impose US levels of border security on a country that had free movement agreements with its European neighbours, some of which saw the collection of passenger information purely for Britain’s security as illegal.
It assumed that train and ferry operators would be willing to ask international passengers for far more data than before, slowing down services, annoying customers and costing money – and possibly breaking the law in countries of departure. Unsurprisingly, they resisted.
The UK also has an entirely open land border with the Republic of Ireland, providing yet another gap.