How would i find / track someone down?

[Tom]

So im fairly good with computers and technology but someone has been giving my fiancee alot of bother at work but she does not know where he lives she knows the town but not the adress and what car etc does anyone know how i could go about finding him he lives in the UK.
He lives in Northallerton (from what i know)
Is between 45-50 years old
Drives a vauxhall astra
and works at the shorthorn inn pub
If anyone could help me or tell me how to find his adress i would be most grateful. Thankyou

[Saumya Majumder]

Go to police. You cant find anyones detail in internet. Like this.