Glow plug warning lamp flashing

Hi there,
My glow plug dashboard lamp has been flashing for the last 6 outings in my car (Golf Mk4 GTtdi year2000), but has now stopped. Any ideas?
Thanks in advance.

Nine times out of ten this is caused by a faulty brake light switch.

Next time it does, look and see if your brake lights are working.

Thanks, I will look out for this,
Regards