E: 15/05 Win a night at a hotel in London and a night at one in Oxfordshire

Rahven

https://charitable.travel/british-airways-prize-draw/

From http://theclub.ba.com/april-2021/en/exclusive-club-offers/

This month, Executive Club Members will get the chance to win one night in a Junior Suite at The Cadogan and one night in a Deluxe Room at Le Manoir aux Quat’Saisons through social enterprise Charitable Travel, which allows travellers to donate five per cent of their holiday payment to a charity of their choice. 

So you might need to be an exec club member. You can sign up for that (free) here.

grannybiker

So, what do they class as a "Vaild phone number" that needs to be entered?

Ms_Dee

grannybiker said:

So, what do they class as a "Vaild phone number" that needs to be entered?

I'm not entering so I don't know, but it looks like they are after either (select your country +44) then 7123456789 or 07123456789 otherwise you could try using the contact us form to ask and let them know it isn't working.