Broke up with girlfriend today. Very heated row. I kicked her out of flat. Not sure what to do. Need urgent advice, please!?

First of all if she's not over her ex she shouldn't be with you period. Seems more like she was using you for a place to live and by the sounds of it apart from the contact with her ex bf there's just as likely to be more to it then that, I mean how do you know she's not still seeing him too? The best thing you can do you have already done, get her out of your life. You don't have to let things be a toxic split though. Contact her, organise a time for her to pick up her things maybe you can organise to leave the building at that time so you don't have to associate with her apart from letting her in. But the worst is over with, I wouldn't press things by asking questions even though it might be tempting and I definitely wouldn't give in if she tries to win you back. All that needs to be done is for her to get what's hers, as that's fair, and you both move on with your lives.

You need to handle this like an adult. Removing all of her things was not the way to do it. All you should do is tell her that you will be out of the flat on this day between x time and x time and she can get her things then. Give her a bit of notice so she can make arrangements. Then on the day you have set, stay out of the flat to allow her to get her things.

Ask her to leave her key behind as well as anything else she may have that gives her access to the building/flat you may need to turn in if you move in the future (laundry key, post box key, building key, etc).

Be sure to take a picture of everything that is yours and catalog major items she may try to take with her like a gaming system or a TV so you know what condition they're in before she comes in case damage occurs. Make sure you have proof they are yours if you suspect she may try to take them.

You were right to end things since it seems like she has been dealing with this for months, even after you supposedly already handled the issue.

Words like "row" and "flat" lead me to believe you may live in the UK, i.e. a country that offers taxpayer funded counseling services. Suggest you and she live separately for a while and get into therapy to see if this relationship is worth saving.

She gets her stuff & you need to accept that and move on.

If you are afraid for your own safety, then you can ask for a police escort to be present when she/her family comes to pick up her stuff.

You can put it in a communal area and inform her that it's all there, and if she doesn't get it by XYZ time then it's going in the trash.

You can leave the apartment but ask a trusted friend to be there when she comes to collect her things at a designated time.

You can pay to put it in a storage unit for a month or so, and give her the access info, and if she doesn't show up to get it in time then the storage company will own it.