My guess is this is what's happening. Also, isnt' our antenna part of the hatch?



FAQ - LED Radio Interference Issues

Some LED lighting products have been reported to emit noise, interfering with FM radio and DAB signals. While the Light Emitting Diodes themselves do not generate any detectable noise, the switching power circuitry driving the LEDs operate at high frequencies, which, when not properly filtered can result in electromagnetic interference.

Based on the reported experiences of some LED users, interference issues and, occasionally EMC violation, can arise as a result of radiated emissions in the 30MHz to 300MHz range by some LED products. The LED lights most commonly involved are of fixture type MR16 (more correctly GU5.3), however radiated emissions have also been observed in other fixture types including GU10, E27 and B22 designs. In the case of MR16 lights, the radiated noise signals would most likely be the result of the electronic transformers driving them rather than the lights themselves.

Electronic transformers are switched mode power supplies that switch the forward current on and off at high frequencies to achieve an average perceived brightness. When these higher frequencies are not properly filtered, it can result in RFI emission. Signals most likely to suffer as a result of radiated noise include FM radio (broadcast band 87.5 to 108.0 MHz) and DAB radio (broadcast band 174 to 230 MHz).