LONDON — Messages between Peter Mandelson and a second high-ranking British government figure are missing from the public disclosures forced by the Jeffrey Epstein scandal because of another reported phone theft, according to documents seen by POLITICO. Nick Thomas-Symonds, the Cabinet minister overseeing the U.K.’s “reset” in relations with the EU, held a formal meeting with Mandelson in January last year about how the then-ambassador might support the ambition from D.C., official disclosures