sixgun

Not milk spot - odd. It's as if it is frosted in parts.
Can we say it is a fault in the die?

https://news.yahoo.com/treasure-hunter-strikes-gold-discovery-181923640.html
Treasure hunter strikes gold with discovery of 700-year-old Henry III coin
The coin carries a pre-sale estimate of £400,000

This is the silver squeeze in action. i know some dismiss it saying that the collective collectors don't and can't have an effect. Silver squeeze days or weekends or whatever doesn't, but a relentless squeeze keeps drawing down on reserves. The European refineries are not producing silver. There are supplies in Russia and elsewhere but those are tapped out for most of this year. Silver squeeze and a record year for coins and bars. U.S. Mint Silver Eagle sales already reached 4.4 million in January 2022. Coincidence?

This is the silver squeeze in action. i know some dismiss it saying that the collective collectors don't and can't have an effect. Silver squeeze days or weekends or whatever doesn't, but a relentless squeeze keeps drawing down on reserves. The European refineries are not producing silver. There are supplies in Russia and elsewhere but those are tapped out for most of this year. Silver squeeze and a record year for coins and bars. U.S. Mint Silver Eagle sales already reached 4.4 million in January 2022. Coincidence?

An interesting vintage bar. Cascade Refining. Just got it off the forum. They didn't make many of these odd weight bars.
The serial number on the bar is the date when it was cast so in this case the 14th April 1989.

A few more bits bought off the forum thanks to @Goldfinga
 

I noticed this last week with my UK address during the checkout process, i thought there was a problem with my account at goldsilver.be as I haven't ordered from them in quite some time, so I emailed them about the issue I was having and they were able to fix it. I'm just waiting on them to fix their storage issue now:/

Nothing in Spain really, certainly not cheap silver. You might get a bit in Andorra which is at the other end of the country. 
i could take a trip up to Belgium and then a plane to Dublin and a bus to the North and come over to England on a ferry. i could get tax free in that way and legally but really it just wouldn't be worth the bother. You would be better buying off the Silver Forum.

i would say you don't need to mention your coin sales. This doesn't sound like the antics of a coin dealer. You sold a few coins from your collection. All of them were UK coinage. Nothing to see here. 

A few more bits bought off the forum thanks to @Goldfinga
 

If i sold you a bar of silver it would be a private sale. i am selling as a private individual, not as a business, not part of my trade. If Atkinson's sold you a silver bar this would be a business sale.

My friend has a sub to Maguire and he tells me that this is what he said this evening "There is little doubt that even in the face of bullish or bearish crosses, the refiner production constraints we have reported last Monday, are beginning to filter through  in both Gold and especially Silver are forcing COT’s to buy to cover EFP delivery demand."

The OP says this was a private sale. So no need to get into badges of trade.
As BYB says a UK taxpayer have a CGT allowance of £12,300 in the current year.
If the coin is a UK coin it is tax free. i think considering the box is unnecessary. You sold the coin. The box came with it. You say it was free. No-one can say it was anything else. If this is a private sale no-one knows exactly what you sold or how you sold it.