Where sells 8 wash hair colours? (Post colour b4)

[Stillmonday]

I've used a Colour b4 but now I need to tone down the ginger hue I have.

I've been advised to get an 8 wash colourant but I've been to 3 different shops and they don't have any, they only have the 24 wash.

Where can I get one from?

Morrisons, superdrug, sainsburys may do them.

Nice and Easy "colour enhancer hair dye" is, I think, one of the only 8 wash dyes you can get these days. You can usually only find it in Superdrug. They definitely have it online. I think Superdrug might do their own version too but I've never tried it.

Wilkos sell them, think they're called 'colour enhancers' now.

Tried sainsburys, morrisons, tesco & Superdrug but no luck.
However Superdrug do them onlinecso I've ordered - thank you!