1960's/70's book - can you remember? need help!!?

can anyone remember a children's book, probably late 60's/early 70's about twin girls called jane and judy (i think) had a playhouse in their garden and used to have sleepovers and adventures etc etc

a book of short stories, one of them was about them attending their teacher's wedding as bridesmaids because the orignial bridesmaids were unable to attend

i would love to hear from anyone that can remember this book as i would like to find out the name and get hold of it for my young niece

1960's/70's book - can you remember? need help!!?regal theater

sorry I was more into Janet and John

1960's/70's book - can you remember? need help!!?performing art center opera theater

were they part of the jane and dick books, i think ladybird published them, give them a try