Home of colour paint in homebase is Buy one get one free. This is the 2.5 litres and the 5 Litre colours that are included in this deal.
2.5l x 2 for £10.00
5l x 2 for £17.99
All stores have a shedload of extra stock in the warehouse so if the shelves are empty, and they were flying off the shelves today, then ask a member of staff to get some from the warehouse for you.
edit, if they are totally sold out, place a customer order. You will pay todays price and only wait up to 3 weeks for delivery. This is cheaper than usual clearance prices.
This is 4 days only, ending on Monday at 8pm.
Mods, I looked and couldnt see this, so if it has been posted and I missed it, I apologise.
Also Best Buys at Homebase start a week today (you have been warned).