According to Polish tradition, a proposal should happen in her family's house.
We do things differently in the UK :p
Before asking the girl to be your wife, you MUST ask her father for her hand. If you do not do this, - this is an affront and shows you have no manners.
her dad died, I asked her mum tho :)
The engagement ring should cost at least your monthly salary. Anything less is not worth having.
Yet another reason why marriage is decreasing in popularity!