Ooh, as Mrs Merton used to say - time for a heated debate...
To filter or not to filter...
The original purpose of the UV filter was to cut through the haze that you often get at altitude - the blue cast was always a lesser issue IMO. It's not strictly true to say that digital cameras aren't susceptible - both CCD and CMOS sensors have sensitivity from 190 nm upwards. But in practice these days it doesn't seem to be an issue unless you are literally at the top of Kilimanjaro.
The reason I use a UV (or other) filter on the front of all my lenses is simply protection.
I have had two occasions where a £1000+ lens has been saved by a £50 filter. Both times were in southern Africa (FB's travel tip #4 - Africa hates your kit).
But there's also continuous, insidious damage on a daily basis, especially if, like me, you tend to be - ahem - a bit gung-ho about getting the shot...
If you use a loupe or strong magnifier to look at the front element of a lens which is a few years old but hasn't been protected, you'll tend to see lots of tiny little marks - in contrast I have lenses which have been behind filters for 30+ years which are still perfect.
Now I've heard modern people say that you shouldn't care about this - your lens is basically a consumable item which you won't be using in 3 years time anyway - it doesn't need to last 50 years like they used to. But old habits die hard with me.
The counter argument (usually without any empirical support) is optical degradation - but I use Hoya Pro-1 filters (multicoated both sides) and can see no optical degradation whatsoever. It's trivial to perform your own tests and make your own mind up. If I can't see any difference in a 36 Megapixel image at 100% then I'm happy.
selks the economics in your case may be different. You've got a lens which will cost just £229 to replace and a 52mm Hoya Pro-1 UV costs £25 - yer pays yer money and yer takes yer choice...
But when you mentioned 'Hebrides' it brought back memories of wind, lashing rain, mud, and bobbing around in boats being sprayed...
Ooh - another good way to protect your lens is to keep the lens hood on all the time. My only issue with this is that it makes your camera look much bigger and more impressive and more of a 'target' in certain environments.