Same boat, 7th April sale and new purchase agreed, small chain 3 of us, the people I am buying off had documents to sign a full week ahead of me yet I had turned around my fixtures and fittings on 12th April and only received my sellers details Saturday just gone. Hoping to move on 7 or 14th June my buyers are first time buyers and the people I am buying off are moving into a vacant property.
I wish you all the best with that timeframe! We are in a similar situation of just 3 houses in the chain, yet we agreed the sales in mid February and are still yet to exchange. Admittedly, 2 of the houses are around the 100 - 150 year old mark, so you always expect to uncover some issues, but the process of buying and selling is long and arduous!