it should be on the list, the phils was in the second batch of countries, they just haven't updated the list
but as terpe has said you shouldn't need to worry about it, at worse your wife will get asked for an x-ray to be taken at the airport when she arrives( greater chance at the London airports), more likely she will get a letter weeks after shes been in the Uk, asking her to attend a clinic for one to be taken.