Yes, they will. (Guessing you're in the British Isles?) You could put a layer of cardboard under the bin. When the first batch is ready to spread on the garden you can empty the bin and replace the cardboard with new. Return any uncomposted material to the bin. (It's easier the lift the bin and remove the compost rather than fiddling about with those little doors.)

Thanks, I also have some weed suppressant membrane, would that work as well? Or maybe use both?

Don't use a membrane. Dig up some and use a spade around the edges to sever as many roots as you can, as well as cardboard. But some will still want to get in.

Ha Ha nightmare. Yes I am in the Uk, Somerset, and very hot. I'm nearly 70 so can't do too much heavy digging but I've spent the last 2 days pulling roots and getting out as much as I can. I figure if I dig out all the old established woody roots, at least what comes through should be new growth and easy to spot and remove... I hope! Thank you again.

I'm just up, or possible down, the road from you, Rose. If you can get a second bin you can make life even easier. Does your council do a discount? Fill one and forget it. Fill the other. Forget bin two and go back and investigate bin one. Three is even better!

You could use the weed fabric around the bin to give you something towalk on. And it'll help to suppress the ivy and brambles round the bin. But don't put it under it. And don't leave it down permanently. Just use it to keep on top of areas for a season.

I wish we'd get some rain!

Thanks, I've not really got room for another bin, and ideally I should have got a smaller one but with coronovirus and shopping online there was not a lot of choice. I didn't know you could get them from council, but my neighbour just told me! I'm putting a wildflower garden around the same area so any rogue brambles and ivy can get dealt with as they come up, and the whole lot mowed (if neccessary), once or twice a year. I have so much garden waste and no car so I was looking for killing two birds with one stone! I'm not sure I remember what rain is!

Ok the bin is up and running... now for the next question. I frequently go out walking and pass a lot of horse poo. Is it ok to put small quantities of this in the compost bin? I've tried looking on google and there seems to be no information about plastic compost bins, just heaps!

Yep, chuck in the poo.

Thanks for all the help.... next question! I did a load of dead heading yesterday most of which I know can go into the bin, but the broom has seed heads attached? Ditto the aquilegia.... and ongoing other plants will have self-seeding heads. I have a lot of wildflowers which are allowed to self seed but I don't want anything growing in the bin, so should anything with seed heads go in? Sorry to be thick!

If your bin contains lots of green stuff it will heat up and actually get hot enough to kill the seeds.
I never use a bin, juts a heap.....and when I have had a lot of green stuff like grass clippings, it actually gets hot enough to steam. But if you just put a lot of "brown" stuff in, you will grow some flowers or weeds until it gets finished...good and rotted.

Thanks, it is a a plastic compost bin, 220 litres, and I got it partly to help get rid of garden waste that I cannot burn or get to tip, so mostly garden waste, grass clippings, prunings, small twiggy bits. I'm on my own so not a great deal of compostable kitchen waste, but I put in things like cardboard egg cartons, tea leave, peelings etc., I have fond memories of my grandfathers 'steaming heap' but unfortunately I could not do that so the bin was the only option. Learning as I go.... thanks again.

I agree with floral. Everyone will likely have some types of pernicious plants/weeds they don't want coming back or propagating further (some vines in my case) and won't put in the pile, but mostly not worth the effort to separate for everything else.