Understood, but unless you tell us that inn your post, we have no way of knowing that. If that was part of your post, woulda used UK pricing. The EVGA SC series however remains a difficult choice wherever you buy it. Are you getting 3 GB or 6GB ? I would doubt that the new "fixed" models are available yet.
EVGA 3GB SC is £205.95
https://uk.pcpartpicker.com/product/pKX2FT/evga-geforce-gtx-1060-3gb-sc-gaming-video-card-03g-p4-6162
Superior MSI Gaming w/ none of those faults is £199.98 .. you save £6
https://uk.pcpartpicker.com/product/W9cMnQ/msi-geforce-gtx-1060-3gb-gaming-x-3g-video-card-gtx-1060-gaming-x-3g
There's other choices, where you escape these concerns down to £194.98 ... you save up to £11
https://uk.pcpartpicker.com/products/video-card/#sort=a8&r=3072
As for the 6GB, there is an EVGA for £253.98 but it's a mini...the full card is listed at £299.49
Meanwhile ....
Giga has an offering at £238.98 ... MSI at £248.42 and ... Asus at £239.98
https://uk.pcpartpicker.com/products/video-card/#sort=a8&r=6144
As for the MoBos, the price difference likely has as much or more to do with rebates ($20) than regional price differences.
The M5 is going for £154.50
https://uk.pcpartpicker.com/product/F9Gj4D/msi-motherboard-z170agamingm5
The following boards have return rates above 2% ....
MSI Z170A Gaming Pro
MSI Z170A Gaming M5
MSI Z170A Gaming M3
ASUS Z170-Deluxe
ASUS Z170-A
ASUS Z170 PRO GAMING
Gigabyte GA-Z170XP-SLI
Not saying that in and of itself makes them bad choices, but it does suggest you might want to evaluate user reviews in detail to perhaps get an understanding of what types of problems were encountered.
Looking newegg user reviews, the Gigabyte Gaming 5 has 88 user reviews and tho the 38% 5 eggers is a bit lower than I'd like the 4 eggers are up at 28% (66% combined ain't bad at all) and the 1 eggers only 11%
Looking at UK pircing, not seeing much else impressive in your price range. On this side of the pond, the gaming 7 is a no brainer at $70 off MSRP... for you not so much as you don't get the rebates.
Still, given the RMA rate and user reviews on the MSI M5, while it's still a better choice then the equivalently featured but £201.57 Asus Hero, those RMA rates should give you pause. Again, not saying it makes it a bad choice... but worth looking at the list here to see if anything strikes ya fancy.
https://uk.pcpartpicker.com/products/motherboard/#c=110&X=12534,17514&sort=a8&page=1