EXHIBIT 32.2

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the quarterly report of Northwest Biotherapeutics, Inc. (the
"Company") on Form 10-Q for the period ended March 31, 2005, as filed with the
Securities and Exchange Commission (the Report), I, Larry L. Richards, certify,
pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, that:

(1)     The Report fully complies with the requirements of section 13(a) or
        15(d) of the Securities Exchange Act of 1934; and

(2)     The information contained in the Report fairly presents, in all material
        respects, the financial condition and results of operations of the
        Company.

Date: May 13, 2005


/s/ Larry L. Richards
- ---------------------------------------------------
Larry L. Richards
Controller (Principal Financial and
  Accounting Officer)