any ideas where to look for flower girl dresses for ages 1, 2, 4 and 6 year...

Hi Have you looked on Debenhams or M&S :)

Monsoon

eBay and Amazon they have a range of ages x

I would go to a bridal shop as trying to get the same dress will drive you crazy

House of Fraser and yumi girls x

Monsoon are fantastic for flower girl dresses.

Debenhams do a great range x

We got ours on Amazon and it was perfect! She had food & drink all over it by the end of the wedding but it didn't even matter because it wasn't expensive but served its purpose and it matched mine perfectly!
https://www.amazon.co.uk/gp/aw/d/B01AJOG4UG/ref=mp_s_a_1_18?ie=UTF8&qid=1502609193&sr=8-18&pi=AC_SX236_SY340_QL65&keywords=flower girl dress

Tk maxx

Childrens boutique on facebook https://www.mychildrensboutique.co.uk/
They are brilliant dresses from 3 months to 8 years I believe in same styles

Monsoon xx

Asos