- WM Morrison Supermarkets Limited5Retailers - supermarkets/hypermarketsGwyneddLL57 2EE
- Westend Academy5Restaurant/Cafe/CanteenGwyneddLL57 1LJ
- Whistlestop Ice Cream Kiosk5Mobile catererGwyneddLL57 2SW
- Whistlestop On The Pier Cafe5Restaurant/Cafe/CanteenGwyneddLL57 2SW
- William Hill PlcExemptRetailers - otherGwyneddLL57 1PD
- Wok & Go5Restaurant/Cafe/CanteenGwyneddLL57 1PA
- Wood Fired Shack5Restaurant/Cafe/CanteenGwyneddLL57 1NY
- Y Caban5School/college/universityGwyneddLL57 4BN
- Y Vaults5Pub/bar/nightclubGwyneddLL57 1YA
- Ying Wah5Takeaway/sandwich shopGwyneddLL57 2EU
- Yo! To Go!5Takeaway/sandwich shopGwyneddLL57 4SU
- Ysbyty Gwynedd5Hospitals/Childcare/Caring PremisesGwyneddLL57 2PW
- Ysgol Babanod Abercaseg5School/college/universityGwyneddLL57 3PL
- Ysgol Bodfeurig5School/college/universityGwyneddLL57 4RN
- Ysgol Cae Top5School/college/universityGwyneddLL57 2GZ
- Ysgol Ein Harglwyddes5School/college/universityGwyneddLL57 2UT
- Ysgol Glancegin5School/college/universityGwyneddLL57 1ST
- Ysgol Gynradd Llandygai5School/college/universityGwyneddLL57 4HU
- Ysgol Gynradd Llanllechid5School/college/universityGwyneddLL57 3EH
- Ysgol Gynradd Rhiwlas5School/college/universityGwyneddLL57 4EH
- Ysgol Gynradd Tregarth5School/college/universityGwyneddLL57 4PG
- Ysgol Hirael5School/college/universityGwyneddLL57 1BA
- Ysgol Penybryn5School/college/universityGwyneddLL57 3BE
- Ysgol Uwchradd Dyffryn Ogwen5School/college/universityGwyneddLL57 3NN
- Ysgol Uwchradd Friars5School/college/universityGwyneddLL57 2LN
- Ysgol Uwchradd Tryfan5School/college/universityGwyneddLL57 2TY
- Ysgol Y Faenol5School/college/universityGwyneddLL57 2NN
- Ysgol Y Garnedd5School/college/universityGwyneddLL57 2LX
- Ysgubor Moelyci5Restaurant/Cafe/CanteenGwyneddLL57 4BB
- Yugen Coffee House5Restaurant/Cafe/CanteenGwyneddLL57 1DN
- Zizza pizza1Takeaway/sandwich shopGwyneddLL57 1YA
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