<SEC-DOCUMENT>0001193125-18-172089-index.html : 20180523
<SEC-HEADER>0001193125-18-172089.hdr.sgml : 20180523
<ACCEPTANCE-DATETIME>20180523163056
ACCESSION NUMBER:		0001193125-18-172089
CONFORMED SUBMISSION TYPE:	6-K
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20180523
FILED AS OF DATE:		20180523
DATE AS OF CHANGE:		20180523

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NuCana plc
		CENTRAL INDEX KEY:			0001709626
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			X0
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		6-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38215
		FILM NUMBER:		18855444

	BUSINESS ADDRESS:	
		STREET 1:		3 LOCHSIDE WAY
		CITY:			EDINBURGH
		STATE:			X0
		ZIP:			EH12 9DT
		BUSINESS PHONE:		44-0-131-248-3660

	MAIL ADDRESS:	
		STREET 1:		3 LOCHSIDE WAY
		CITY:			EDINBURGH
		STATE:			X0
		ZIP:			EH12 9DT

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	NuCana BioMed Ltd
		DATE OF NAME CHANGE:	20170619
</SEC-HEADER>
<DOCUMENT>
<TYPE>6-K
<SEQUENCE>1
<FILENAME>d593206d6k.htm
<DESCRIPTION>FORM 6-K
<TEXT>
Document 1 - file: d593206d6k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>d593206dex991.htm
<DESCRIPTION>EX-99.1
<TEXT>
Document 2 - file: d593206dex991.htm

</DOCUMENT>
</SEC-DOCUMENT>