looking for some information

i was wondering if someone could give me some info. i work just outside Glasgow and each morning i walk past what was a park which now has an industrial estate on it but there is a small space left of land with some water and for the pass week i have seen what looks like a stork! i cant get close enough to get a good picture but from googling birds it looks like a stork. Should it be there? do they migrate south for the winter? if anyone can help with any info it would be great. dont want to call bother people if the bird should be about here but its the first and only one ive ever seen. thanks louise