Jealous daughter - help!

[CANRT]

Hello all!
Newbie here so please bear with me! And I hope I'm posting in the right forum.
Anyway, I was wondering if anyone could help. I have a 9 year old daughter who has over the last few months become extremely jealous of my partner (of 2 years, but it is only in the last 6 months has he begun to spend any real time with us as a family). She has become fairly manipulative, not letting either of us be in a room by ourselves and physically pushing either of us aside if just, for example, reading a newspaper together. She has started doing this to her father's partner - and they have been together for 5 years - we all think it is happening now because she has realised that it is serious with my partner (we spent Christmas with his family) and it's become very real to her that she is "different" to her friends. Everyone is quite fed up and very unhappy - and her father and I want her to see a counsellor.
So.. my questions are these... can anyone advise on how to deal with this? Has anyone had any experience with this and what worked, what didn't work? I have no other kids and my partner and I don't live together (yet)..
Also looking for recommendations on a therapist in South East London for her, as some of these jealousy problems are spilling into her life at school and she's having problems maintaining relationships... Any thoughts / advice would be MUCH appreciated!
Thanks

[Luna9]

Have you tried to talk to her and find out what her concerns are and maybe give her some reassurance; maybe she is going through a stage and talking may be good for her; she may not see a therapist but you and get father can try to talk to her and assure her that even with your new partners she is the main priority in your life and try to spend some quality of time only with her.