IV. Instrumental errors of barometric altimeters and air data computers Further errors lowering the accuracy of the altitude measurement by barometric mechanic altimeters are instrumental errors caused by qualities of barometric boxes, it means hysteresis and elastic after-effect, and also errors caused by the friction in the gear mechanism.
I am about to travel. However, I need to renew my passport. Will the new one have the same number as the old passport? When renewing your passport, please note that the number assigned to a particular passport is for that document only. Upon renewal, your new passport will have a different number. It is, therefore, recommended that you plan ahead if you intend to travel soon or apply for a visa as your passport number is required for the visa-application process.
I phoned the Identity and Passport Service to ask them this question and they informed me that the passport book number in a UK passport is the same as the passport number.