FORM 6-K

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Report of Foreign Issuer

Pursuant to Rule 13a-16 or 15d-16 of

the Securities Exchange Act of 1934

For the month of June 2018

SANTANDER UK PLC

(Translation of registrant’s name into English)

2 Triton Square, Regent’s

Place, London NW1 3AN, England

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F x Form 40-F o

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes o No x

THIS REPORT ON FORM 6-K SHALL BE DEEMED TO BE INCORPORATED BY REFERENCE IN THE PROSPECTUS INCLUDED IN THE REGISTRATION STATEMENT ON FORM F-3 (FILE NO. 333-213861) OF SANTANDER UK PLC AND TO BE A PART THEREOF FROM THE DATE ON WHICH THIS REPORT IS FURNISHED, TO THE EXTENT NOT SUPERSEDED BY DOCUMENTS OR REPORTS SUBSEQUENTLY FILED OR FURNISHED.

Santander UK plc hereby incorporates by reference the following exhibits to this report on Form 6-K into its Registration Statement on Form F-3 (File No. 333-213861).

Exhibit No.		Description of Document
4.6		Third Supplemental Indenture, dated June 1, 2018 between Santander UK plc and Wells Fargo Bank, National Association, as trustee.

5.1		Opinion of Cleary Gottlieb Steen & Hamilton LLP, special U.S. counsel to Santander UK plc.

5.2		Opinion of Slaughter and May, English solicitors to Santander UK plc.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	SANTANDER UK PLC


	By:	/s/ J Wainwright
	Name:	J Wainwright
	Title:	Authorised Signatory

Date: June 1, 2018