Where abouts in Uk sister , please be aware , u dont wana take it to those who believe in these things n create them , Like hidden peer or saint or "apparent righteous" person or imam of the masjid or sufi saab, coz they just might tell u its fien n its alright.
See with taweez , it could be magic , it definetly is shirk , and well even if its some sort of ayaat n all n duaas n strange arabic wors that some "extra smart" person came up with , it can still make a person commit shirk , epending on why did he getit n hang it or wear it, but since u metioned u found them , InshahAllah have them checked out to see if they are magic or not , if some one had just brought it for any problesm they were facing pr protection , then unfortunatley they have fallen in shirk , and may Allah forgive them n help them understand and repent , coz Allah acccepts the repentace n he is the most forgiving.
but yes again , where abouts in Uk sister n lets see if we can suggest a masjid for u to go to or center