Here is some information I found on Dr. John Singleton.

Dr. John Singleton was a student in the University of Oxford; from whence, after he had been there eight years, he was turned out by the commissioners in 1660. He then went to Holland, and studied physic, but never practised it any farther than to give his advice to particular friends. His settlements were various. Residing some time with Lady Scott in Hertfordshire, he preached then to some Dissenters at Hertford. He was afterward pastor to a congregation in London. When the meetings were generally suppressed, he went into Warwickshire, and lived with his wife’s brother, Dr. Timothy Gibbons, a physician. Upon King James giving liberty, he preached first at Stretton, a small hamlet, eight miles from Coventry, and then became pastor to the Independent congregation in that city. From whence he was again called to London, to succeed Mr. T. Cole.—Palmer’s Nonconformists’ Memorial, vol i., p. 170. There is a sermon of Dr. Singleton’s in the Morning Exercises.

And another site states this:

John Singleton, pastor at Stretton-under-Fosse, who preached in Coventry from 1688 onwards, (fn. 52) succeeded Bunn there later in 1690 but moved to London in 1698.

- The Pilgrim

Thanks!