<sod >Merlin Entertainments, operator of Madame Tussaud, Alton Towers and other attractions, has seen a fall in demand from domestic tourists following recent attacks in London and Manchester and said on Tuesday foreign visitors could stay away in the coming months.< eod>< sod > Merlin Entertainments, operator of Madame Tussauds, Alton Towers and other attractions, has seen a fall in demand from domestic tourists following recent terrorÂ attacks in London and ManchesterÂ and said on Tuesday foreign visitors could stay away in the coming months.< eod>