The probate courts of the archbishops of Canterbury and York, which proved the wills of testators who left considerable goods in more than one diocese or deanery. Wills proved in the Prerogative Court of Canterbury (the senior of the two) from 1383 to 1858 are kept at The National Archives in PROB 11 and 12. Indexes have been published down to 1700, and the Society of Genealogists has a slip index for 1750–1800. Surviving probate inventories are collected under PROB 2 to 5. During the years 1653–60 all wills in England and Wales were proved through this court. The probate records of the Prerogative Court of York are housed at the Borthwick Institute for Archives, York, alongside the records of the archdeaconry of York. The Yorkshire Archaeological Society Record Series has published indexes from the 1380s down to 1688; typewritten indexes are available for later periods.
http://www.nationalarchives.gov.uk/documentsonline/wills.asp PCC wills.