Thanks all, sorry about delay in replying, I was on a night shift.
I've tried a lot of those suggestions. My plan was always to offer her food, take it away with no fuss and not offer an alternative. This however doesn't bother her in the least. She's happy not to have any. We always sit down with her but to be honest it's an absolute nightmare. She throws the food, won't sit at the table. Often I let her sit on my lap and help herself to my plate but she's liable to throw my food too! She's hit and miss at nursery. She eats more frequently there, but never finishes anything and eats tiny amounts painfully slowly. Even these good days I refer to will see her eat one good meal!
I do my best not to push her or show my frustration but it's tough. Today I let her have her lunch in the living area while she played and she definitely ate a little more. Just feel like we should be able to sit down together to eat- I love to cook and see meal time as family time. But I suppose for now the aim is to get her used to eating at all and hopefully she'll get used to having a full tummy!
She won't have any milk, yoghurt, cream or cheese unless it's disguised (in Mac and cheese for example). The only foods she really likes is strangely fish so I give her as much as I can. She'll usually eat a few bites of fish. I'm worried she'll get sick of it though! Loves water, that's not a problem.
I haven't tried cooking with her, but will give it a go for sure. She certainly loves to make a mess.
She's otherwise happy, never sits still. Runs everywhere, jumps and climbs. Great with her hands, loves duplo. Speech isn't great (has about 10-15 words, none of which are very clear) so I wonder if it's partly frustration. She's very able to communicate though and understands lots. Sleeps fine, through the night 50% of the time or wakes just once.
She's always been very attached to the breast. I feel guilty about working and probably give in more than I should as I know she misses me when I'm gone.
My only concern is the lack of weight gain. She's dropped from above the 75th centile line at 6 months, to below the 25th now. If she stabilised I'd be happy that she's just finding a new line, but she's consistently slipping. She still in a lot of her 9-12 month clothes, which she's been wearing since last winter at this stage!