You could raise terrorism concerns about any major piece of infrastructure really.
You've got to also put it into context, there have been fewer terrorism-related incidents in the Republic of Ireland than almost any other major EU country. Terrorism isn't really an issue that crosses most people's minds down here at all.
On top of that, the IRA etc etc are all pretty much inactive now due to the Northern Ireland situation having moved forward so far since the middle 1990s so, I wouldn't really think it would be any more of a concern than any other piece of infrastructure anywhere else.
The main reasons that it wouldn't ever be built are economic and technical.
The channel tunnel passes through chalk rock which is extremely easy to drill. It's a bit like putting a tunnel through cheese and it's also quite a shallow crossing and it's very short.
Contrast that with the Irish sea crossing from Dublin to Holyhead. First of all it's 120km vs 50km for the channel tunnel to France.
Secondly the Irish sea is a lot deeper and the seabed is a mixture of seriously hard rocks including granite which would make drilling very, very challenging.
Then on the economic side of it. The population of the Republic of Ireland's only 4.5 million and Northern Ireland 1.8 million so, 6.3 million on the entire Island of Ireland.
The crossing options would be Dublin-Hollyhead : Which takes you to a relatively remote part of North Wales which is still a long distance to London or SE England.
Or, Larne (Northern Ireland) to Stranraer (Scotland) which is an extremely remote point of Britain.
So, basically you'd end up with an astronomically expensive tunnel which took you to a remote rural part of Wales and then there are no HSR links from there to London.
To make matters even more "interesting" Ireland uses its own gauge for rails. They're slightly broader than international standard rails (4 ft 8 1⁄2 in / 1435mm) where as Irish rails are 5 ft 3 in (1600 mm). So, British trains couldn't even run over Irish tracks and visa versa without major complications and gauge-changing systems on the wheels.
So, I think we'll probably stick to flying for the foreseeable future!
At present this is as close as we get to HSR here up to 200km/h
These are the Intercity trains that run all of our long distance routes other than Cork-Dublin which has a pointier version.
I still prefer the train though in some ways to driving because you can kick back, get a bite to eat, a decent coffee and you've a power sockets and WiFi on board which makes the journey a bit more relaxing and productive than driving on a motorway.
That's the Cork-Dublin train :
Regular Intercity 22000 network trains :
(all 'long distance' routes)
That's what commuter rail looks like in Cork (where I'm based). Ireland's second city (about 300,000 in the general vacnity so a far cry from London!)
Just thought I'd give you guys a flavour of what the place looks like
Here's the sprawling metropolis lol :
Finally :
My more usual way of arriving home:
post was last edited: 11/8/2013-05:49]