UK Manufacturer Research for Ladies Clothing Line

Hello,
I am launching my own Women's Exquisite Evening/ Special occasion clothing fashion line.
I need some research to be done to source for 3 manufacturers in UK that are able to meet the following criteria.
The research required includes ensuring the 3 manufacturers you provide all meet the criteria I've defined below and evidence of this communication with the manufacturers will be required.

- Low minimum order quantities - MOQ of 50 and under
- Manufacturer with ability to be creative and produce high quantity samples from just a picture
- Provide high standard quality ( evidence of other similar brands worked with will be required)
- Provide fast and efficient service
- Significant experience producing exquisite women's special occasion wear (evidence required)
- Reasonable pricing - As a guide manufacturing cost per dress budget is £50 - £100 depending on detail.
- Information on meet ups and tradeshows that they attend
- Willing to provide product samples as requested
- Visits to factory allowed
- If they provide private labelling as well. ( They design and manufacture and I use my own brand ) this information will be useful to have.

I have attached some samples to show the level of workmanship I am looking for .
The aim by the end of this project is for me to have a list of manufacturers that meet my criteria that i can go visit and commence business relationships.

NOTE - I do not want manufacturers from anywhere else but the UK.
Thanks
Sandra