Lens Advice for upcoming holiday

[Katt]

Hi All,
I need a little advice with which lenses to take on my upcoming seven week trip to Europe.
I am definitely taking my 24-105mm which I have used in the past as my general walk around lens. I am wondering if it is worth taking a 10-22mm & 85mm lens & a speedlite?
I will be going through the UK, Spain, France, Switzerland, Italy & Germany. There will be a lot of countryside as well as architecture in the cities. I can justify the 10-22mm but not sure about the 85mm or the speedlite given that flash photography tends to be prohibited in most places so perhaps I should just rely on the in camera flash?
Any point in taking a Gorillapod DSLR tripod? Was given one as a gift but am yet to use.
Any advice from anyone who has travelled as to the most versatile kit?

Cheers,
Katt