What town is 225 dialling code in the UK?

Answer 1

No town has that dialling code as all exchanges external to your area start with a 0.

There is no town that has phone numbers starting 0225

Since 1995 a 1 was inserted after the initial zero into all STD dialling codes. In 2000 some large areas were split off into STD codes starting 02... (eg London which was 01 was split into 071 (inner) and 081 (outer) which became 0171 and 0181 in 1995; then in 2000, the inner/outer digit (7/8) was added to the start of the 7 digit phone number to create an 8 digit phone number and the London STD code became 020.)

The town that now uses 01225 is Bath.

If that is an exchange in an area (eg 0121 225 1234 or 0161 225 1234) then it will depend upon the STD area (0121 is Birmingham, 0161 is Manchester in the given examples).