GB United Kingdom Major Cities Postal Codes
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📮 United Kingdom Postal Code FAQ & Postal Regulations
❓ Common FAQ
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What is the basic format of a UK postcode?A UK postcode consists of 5-7 alphanumeric characters, split into two parts: the outward code (area and district) and inward code (specific street/building). Examples: SW1A 1AA (London) or M1 1AE (Manchester).
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How to find or validate a UK postcode?Use Royal Mail's free Postcode Finder tool on their official website to search by address, or third-party APIs for validation.
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What happens if I write a wrong postcode?Incorrect postcodes may cause delays, returns, or lost mail. For important items, use Tracked services and double-check the recipient's postcode.
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Is a postcode mandatory for UK mail?Yes! Postcodes are essential. Mail without a postcode or with errors faces significant delivery issues. Always write the postcode on a separate line at the end of the address (e.g., London
SW1A 1AA).
📋 United Kingdom Postal Regulations & Tips
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Writing StandardsPostcodes MUST be in uppercase with a space (e.g., AB12 3CD). Handwrite clearly to distinguish 0/O, 1/I, etc.
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Parcel RestrictionsMax dimensions: length ≤1.5m, length+girth ≤3m. Prohibited items: lithium batteries, flammables, cash (special services required).
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Delivery TimesUK Standard: 1-3 working days; International: Europe 3-5 days, North America/Asia 5-10 days. Allow +1 week during peak seasons (e.g., Christmas).
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Address Format TipsWrite building number and street on one line, town/city on next line, postcode alone on last line. Example: 10 Downing Street
London
SW1A 2AA