Normally, I'd agree with you, Ste. But if (a very big 'if') the GFS's evolution is correct, most of the WAA is being pushed eastward into northern Europe, suggesting that the Eurohigh might be the more dominant feature; the Greeny, meanwhile, keeping LP pinned into the central Atlantic??
It all has me thinking that the pattern will stay relatively entrenched until the main source of hot air is cut off??