Why am i suddenly getting poor analogue tv and dead terrestrial digital?

It looks as though wrekin (dtt & analogue) and cefn mawr (analogue) are either on , low power or being interfered with drastically. it seems to be prevalent at least around the south-western side of wrexham county borough.
Answer
Atmospheric interference. currently the uk is under a high pressure. if its not ok tomorrow you need a tv engineer