I bought some of scratch cards, but I was a little disapppointed when I realised how little money went for the restoration. And I don't think the money from the loto would go to Notre Dame, the idea of the loto was to help preserver buildings that don't receive as much attention.

There's more information on the loto on that page:

https://fr.wikipedia.org/wiki/Loto_du_patrimoine

They should have a chat with the UK Houses of Parliament's building management team.