Re: "Suscicious Activity"?
Last year I bought a diamond engagement ring for ~£10k in a jewellers in Hatton Garden. I was expecting that to trigger some kind of call from my bank, fraud check etc, but that just sailed through - most I've ever spent on a thing that was not a house.
Afterwards, I went into a Boots and tried to buy a bottle of water. Both cards rejected, had to spend 10 minutes on the phone to HSBC re-activating them.