EXHIBIT 31.1

                                  CERTIFICATION

I, Nathaniel D. Woodson, certify that:

1. I have reviewed this Amendment No. 1 to the annual report on
   Form 10-K/A of UIL Holdings Corporation;

2. Based on my knowledge, this report does not contain any untrue
   statement of a material fact or omit to state a material fact
   necessary to make the statements made, in light of the
   circumstances under which such statements were made, not
   misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other
   financial information included in this report, fairly present
   in all material respects the financial condition, results of
   operations and cash flows of the registrant as of, and for,
   the periods presented in this report;

4. The registrant's other certifying officer and I are
   responsible for establishing and maintaining disclosure
   controls and procedures (as defined in Exchange Act Rules
   13a-15(e) and 15d-15(e)) for the registrant and have:

  a)  Designed such disclosure controls and procedures, or caused
      such disclosure controls and procedures to be designed under
      our supervision, to ensure that material information relating
      to the registrant, including its consolidated subsidiaries, is
      made known to us by others within those entities, particularly
      during the period in which this report is being prepared;

  b)  Evaluated the effectiveness of the registrant's disclosure
      controls and procedures and presented in this report our
      conclusions about the effectiveness of the disclosure controls
      and procedures, as of the end of the period covered by this
      report based on such evaluation; and

  c)  Disclosed in this report any change in the registrant's
      internal control over financial reporting that occurred during
      the registrant's most recent fiscal quarter (the registrant's
      fourth fiscal quarter in the case of an annual report) that
      has materially affected, or is reasonably likely to materially
      affect, the registrant's internal control over financial
      reporting; and

5. The registrant's other certifying officer and I have
   disclosed, based on our most recent evaluation of internal
   control over financial reporting, to the registrant's auditors
   and the audit committee of the registrant's board of directors
   (or persons performing the equivalent functions):

  a)  All significant deficiencies and material weaknesses in the
      design or operation of internal control over financial
      reporting which are reasonably likely to adversely affect the
      registrant's ability to record, process, summarize and report
      financial information; and

  b)  Any fraud, whether or not material, that involves management
      or other employees who have a significant role in the
      registrant's internal control over financial reporting.




Date:  September 29, 2004                      /s/ Nathaniel D. Woodson
                                         -------------------------------------
                                            Nathaniel D. Woodson
                                         Chairman of the Board of Directors,
                                         President and Chief Executive Officer