Hi Keith,
Sorry for the long delay in replying. I was waiting for some information to come through.
Your g/g/grandmother Charlotte Sirett b1834 at Adstock.Bucks is my 3rd Cousin 5 times removed.
Or more simply (??) I'm the 7th Great grandson of Charlotte's G/G Grandfather - Thomas Syred b Abt. 1697 Little Horwood, Bucks.
Am I interested? - You bet I am.
Neil