When your settlement visa get approved and it's time for you to join your spouse in the UK... you're packing your things and only allowed 20kilos for check-in luggage and 7kilos for hand carry... supposing your luggage itself weighs 5kilos already so you only have 15kilos for check-in...
...assuming it's your first time to go to the UK and no excess baggage is allowed, what are your priorities to bring when you join your spouse???