Hopefully an easy fault to sort on a 2002 TDI 130 sport estate.......famous last words

Basically, since the freezing weather no water is comming out of the rear washer jet. The pump sounds like it's working, the rear jet has been checked for blockages and it's clear. The pipe through the wiper barrel was replaced last year so hopefully it's not that again - I doubt it is as there isn't any washer fluid running out of the boot door trim and into the lock this time.

So are there any common places/faults I should look for first like maybe a pipe pushing off a connector due to ice and water pressure? There is a little water sitting on the plastic CD changer frame in the LH cubby in the boot, so is there anything around there which may have popped off, thought I'd check before I start ripping out trim.

Thanks

James