Brambles.......

Garden is overgrown. Got rid of all the brambles before with the help of a neighbour and a mini-digger but stupidly allowed them to come back. Large section of garden - probably 100ft wide and 70ft deep with lots of brambles between 4-6 feet high. 

Is a digger the way to go? From memory the brambles didn't burn very well and I don't want to annoy the neighbours but nor will the tip take them. Is a chipper an option?  Difficult to cut and bag so kicking myself I didn't keep on top of it before. 

We won't need to grow anything for a while - is there something I can spray that would kill them to the roots. 

Keen to get them under control so that the kids can run around without their legs being ripped to shreds...

You need to dig them out at the roots.  Otherwise they will come back.  Using roundup or something similar will kill them, but it will kill everything else too. 

Or use a flamethrower?

If you chip them, you will have spiky woodchip.

I'd just dig out the roots (you don't need all the roots, just the growth point at the centre of the roots). 

Keep the area strimmed (with a brush-cutter, not some little lawn strimmer) and just take out the new shoots   as they appear

if you don't get the roots, they come back quite quickly.  Easy to manage if it's a regularly cut lawn.  

They will go through a chipper but you'll still need to discard the chippings properly.  

We'd a bit of land at the end of our garden that we used to dispose of them and grass cuttings.  They compost down eventually.  Dealing with the brambles was a constant struggle

Parsnip, there is nothing there and may not be anyway (paved etc.).  Thanks for all the tips. It's a daunting task and before they were dug out, many an hour/day/week spent cutting them back but they are a nightmare to dispose of. 

Camenbert - any disadvantage to the spikey woodchip other than no being able to use it elsewhere in the garden?