Lower Costs?
I think you are on a sticky wicket there Frank
LHR is one if the costliest airports in the World
If RW3 goes ahead it will be loaded with an incredible volume of debt some of which will be passed on. If it was going to inherit lower costs BA would be rejoicing. They are not.
No guarantee that Liv would get a service anyway.
A dash 8 to AMS is possibly dooable but we will see.