In December 2015 and March 2016 an evaluation found extensive Roman evidence but also a small amount of unstratified struck flint.

From the report:
"The evaluation recovered a five pieces (34g)g) of struck flint as residual or unstratified
material in Roman features, in a moderately to heavily rolled
condition. The struck flint was manufactured utilizing high quality mid to dark
grey raw material with, where extant a medium chalky white cortex. Two uncorticated
blade like flakes (11g) recovered as un-stratified material may be of
early Neolithic origin, while two un-corticated flakes (21g) contained in Ditch
F1023 (L1024) exhibit very regular square profiles and may have been
intended as flake blanks, but show no evidence for trimming or retouch. The
only implement in the assemblage comprises a thumbnail scraper (2g) in
Ditch F1027 (L1028) that had semi-invasive retouch around its leading edges,
with a corticated butt, characteristic of small tools typically found in early
Bronze age assemblages.(1)

<1> Archaeological Solutions, 2016, LAND ADJACENT TO THE A2, FAVERSHAM, KENT. AN ARCHAEOLOGICAL EVALUATION (Unpublished document). SKE31682.