Please help me to find wedding dress

[sviri]

Hello ladies, could I please ask if anyone can recommend or direct me where can I find
a simple, not expensive but good quality wedding dress? I am ready to pay up to £400 max. Maybe there are any sample sales I'm not aware of or nice wedding boutiques? I'm in London.
I contacted Pronovias but their dress prices start from £1000 even for a sample dress . We are having a small wedding in May and I wanted something simple more like a gown than full on wedding dress. Ideally without lace and without train.
I tried to order from Coast and John Lewis Adriana Peppel, dresses looked beautiful on the photo but looked very cheap and poor quality in real life..
I would really appreciate your recommendations!

Samples, once worn, last season. Filter includes UK only. Some are private sales, some shops.

https://www.stillwhite.com

This is an outlet too, but probably too far...(mainline east coast train?)

https://www.bridalfactoryoutlet.co.uk/?utmterm=bridal%20factory%20outlet%20northallerton&utmmsource=google&utmmedium=cpc&gclid=EAIaIQobChMIkNCIuMTz9gIVkNNtCh0rPwirEAAYASAAEgI1CvD_BwE

Thank you so much everyone, so many suggestions I have never heard of! I really appreciate your help xxx