Buying a load of paint - who, where, how much?

[NotAMammy]

I'd like to paint most of my house an inoffensive light grey. It's currently an inoffensive light cream from the previous owners. I need to do the guest room before we have visitors as there are a few scratches on the wall, etc and I figured we may as well paint the rest of the bedrooms while we're at it so at least they're semi done.
Where would be best to go get a load of the same colour paint? We don't have trade accounts with anywhere. We'd be doing three rooms:
4x4.6
4x4.3
2.9x2.3

Homebase often do offers on paint, buy one get another half price.

Wilkos own brand has some good reviews e.g. Pearl Grey Matt Emulsion at £10 for 2.5L works out at £4 per litre.

Dulux Polished Pebble Matt Emulsion is a popular light grey, Wickes currently has a 3 for 2 offer of on 2.5L tins, if you bought 3 that would work out at £4.26 per litre.

Valspar from b&q..... many shades of grey to choose from

Valspar is excellent, they colour match if you have a shade in mind.

Thanks, B&Q feels like our weekend home at the moment and it's where I bought from before so I was planning on getting Valspar premium or Trade if I could figure out how to get a trade account but I wasn't sure if I was missing out on an obvious source.

Valspar do 10ltr drums so I thought that could probably do most of the house and work out most economical. It's something like £85 though so that Dulux one looks cheaper.

I'll keep an eye on Homebase as well. I would normally avoid own brand paint - is Wilko stuff decent then?

You don't need a trade card to get valspar trade, but it does make it cheaper. It is meant to be the best of their range with primer and magic dust. We have used it loads and love it. Yes it isn't the cheapest but we prefer painting with it and the colour choice and see the value in it.

Brewers decorators centres
https://www.brewers.co.uk/
Have fab trade paint which goes on a dream and hundreds of colours plus I opened a cash account I got 20% off my first purchase
We never use the diy stores now

B&Q have offers on the standard Dulux paints at the moment, but you'll need to go to a Warehouse to get the full range. They have 5L tins for £20 and 2 x 2.5L tins for £34. Easter is the busiest time of year for DIY so there are lots of offers around.

It's £24 for 2x2.5 litre tubs of dulux

Ah - the Dulux Kitchen and Bathroom paint is 2x 2.5L for £34. The standard emulsion is 2 for £24.