Dandelions AAAhhhhh

As we all know Dandilions have big long roots so its no good just hoeing them,my question is what is the best way to KILL dandilions ??

As above Glyphosate is the best.
I have recently bought the Doff Glyphosate weedkiller 1 Litre from the pound shops. In fact it was £2 but did the job for those tough type of weeds with long roots. Especially when they are between the path cracks or awkward places to dig out.
A quick spray and a few days later, dead!

I dig them out. Cost in money and environmental damage: nothing.

Certainly is a good year for dandelions, especially in between and adjacent to paving slabs where you can't dig them out properly! 

I also recommend a glyphosate-based weedkiller - I can confirm that Weedol (diquat) only kills the leaves, whatever is says on the packet...

couldn't agree more the no dig way glyphosate spray  Dandelions gone away couldn't do without my glyphosate weeds a thing of the past

the only thing good enough for Dandelions is rabbits they love um

The only sure way to get rid is by digging them out and getting all of the tap root out as has been mentioned above.