In reply to ianstevens:
Income tax in Norway is relatively low, but with high rates of VAT. So buying anything in Norway generally feels expensive to us (who have already paid the tax on our income, and are then paying it again in a high VAT rate). This isn't an EU/Brexit thing - it's just the way they do taxes in Norway.
When we had a climbing trip (pre-Brexit) we took a lot of food in our luggage to keep the cost down. It was a last minute decision (we had a bigger luggage allowance than we originally thought) so we just rammed in as much pasta, tins, chocolate, etc etc as we could. But it was nowhere near 150kg even between the 8 of us.
The airline lost one of my bags (the one with most of my clothes & climbing gear) and buying replacements was eye-wateringly expensive - £4 for a pair of "cheap" knickers (would be £5 for 4 in the UK), for example, and £80 for a BD Half Dome helmet (nearly double the UK price). I also swam in the f-f-f-freezing sea for 10 whole minutes because someone promised to buy me a beer at £10 a pint.