Probably the safest way to get into Welshpool if coming from the SE is to descend into VMC on the way to Shawbury (SWB VOR) and when visual turn left and follow the railway into Welshpool, in the SW direction. Shawbury offer a very good radar service and will even let you use their ILS to get visual.
It isn't often that I've been able to just fly to W direct, because if there are clouds about they are usually not much above the surrounding hills.
Their NDB doesn't work usefully until one is line of sight, and I always get a lot of interference on their frequency, which disappears only when they transmit.