Alot of people do this , the UK morning flights are generally full
In consultancy ,IT and for project related work it is a common practice that people are coming from various locations so you are not expected to be at your desk at 9pm
If a company takes you on they will be either happy that you are commuting or not , if they are then they understand you are going to be in when your first flight is in
Ideally if you could do a 4 day week or work from home one day a week ,it is more manageable just 3 nights away then
It is definitely work exploring as an option ,the UK no matter how bad things are there is still a much bigger job market then ireland
Also if sterling is strong via euro , it helps
On the issue of NWest , London is very easy to commute to because of the good flight schedules and although people complain about heathrow , you can get out of heathrow into the city very easy easily with the heathrow express and there is no delays with passport checks you come straight out. If you keep your luggage to one bag ,then you go straight through in dublin with online check in and no waiting for baggage.