Recently been having problems with WMR200 console losing modified rain gauge signal. 433 MHz rain gauge is on garage roof (as far from overhanging trees as possible) and console search didn’t work so I got out the ladder and used the gauge reset button. Instant signal!
Left the ladder up for a few days just in case the signal was lost again, but decided to take it down when rain was imminent. And the signal disappeared. . .
Repeated this circus until the penny finally dropped. . . the aluminium ladder was acting as a secondary aerial! Ladder up = signal, ladder down = no signal 
