Exhibit 99.1 Amendment No. 1 to Agreement and Plan of Merger This Amendment No. 1 to Agreement and Plan of Merger is dated this 15th day of May, 2007, and amends the Agreement and Plan of Merger dated November 13, 2006 by and among Assabet Valley...Agreement and Plan of Merger • May 16th, 2007 • Westborough Financial Services Inc • Savings institutions, not federally chartered • Massachusetts
