Money laundering regulations prohibit bookmakers from accepting bets from people without a verified account.
So, with betting shops currently barred from opening, there's no way of placing a bet on the Grand National other than by getting someone else to put the bet on for you.
Modeste, send me you selection on the back of a £50 note and i'll put your fiver on for you.
Seriously, you MUST know someone who likes a punt and has on line accounts.