Can I achieve blonde with bleach baths only?

It is certainly possible to achieve blonde with bleach baths only.

One issue that you may face is that your hair lengths may be stained from multiple applications of dark dye, if they are then a full bleach won't take the colour out either and you'll have to wait until you cut them off.

The first thing you should do is use another colour remover as it looks like there is still a lot of permanent dye in your hair. You could try a different brand such as decolour remover which some people have better results with. Make sure your hair is squeaky clean before using it and make sure to rinse for long enough.

Then, after waiting at least a week you can start to bleach bathe your hair. Applying to the longer parts first sounds like a good idea.

Pre made toners are typically made for very light hair and won't work until you already have pale blonde hair. However you can mix your own toners out of blue semi dye and conditioner to tone down orange tones between bleach baths.

Thanks for replying Marthakins.

Is Colour B4 and Decolour Remover both by Scott Cornwall? Is there any difference between them or is it just that people experiencing better results with the latter? I definitely think you're right about doing another. I feel like the front still may have a bit of dye in.

Is there a particular blue semi dye that you would recommend? I read earlier that blue-based toners are better for counteracting orange tones, and purple-based is good for yellow, but when looking on Amazon, most seemed to be violet/purple. What good blue-based toners are there? There isn't a Sally's near me, which I've read a lot about on here.

Color b4 claims to shrink and remove molecules, and decolor remover says it shatters the molecules and then removes them. I have had good results with color b4 extra strength in removing permanent black buildup of 5 years. I did have to do 3 treatments though.

You need a blue based toner just now as there's definitely orange in your hair. Something like directions neon blue would work diluted.
There's really not much point buying a pre made toner, you'll get better results mixing our own and it's cheaper too!

Thank you. How much of the neon blue should I mix with conditioner? Sorry for all the questions! I need hand-holding through it all!

Puerkz, I used Extra Strength but only once, so will definitely see if the local chemist stocks either otherwise I'll pop into town later in the week.

Just had a haircut and had loads of the front, back and top cut off. So it's now a pixie cut rather than a mohawk. The top and crown is still completely ginger though so I'm going to do another ColourB4 (it was £5 cheaper than Decolour Remover) to ensure any leftover dye is gone.

Then I'll do my first bleach bath in a week.

I'm really unsure though how I'm going to bleach bath my hair somewhat evenly when the sides and nape are completely virgin hair now. But all the rest is ginger from my previous permanent dye job. Am I going to end with yellowy-orange on top and white back and sides?

If you need another colour remover shops like Savers and B&Ms usually stock JoBazz or Pro:Voke for less than a fiver, I have used both and they are just as good as the big name brands.

Thanks but there's no Savers or B&M round here! Only Superdrug and Boots. They're opposite one another so I usually check who's selling what the cheapest before buying. Superdrug seem to have some good offers on at the mo. I'm all stocked up for a future bleach bath (once my online deliveries arrive) but still clueless as to HOW I'm actually going to apply it on this new haircut to ensure even lifting.

Currently sitting with my head wrapped in clingfilm and saturated in ColourB4. Fingers crossed it gets rid of any red dyes still lurking in there.