Why doesn't the UK stamp your passport?
Why doesn't the UK stamp your passport? But it doesn't matter as the UK (and US) do it a different way. Customs do not stamp passports, border control (border police) do. The UK do not have any passport control upon exiting the country as the EU/Schengen has so nobody gets an exit stamp.
Do pilots get their passports stamped?
Surprising (or unsurprising) though it may be, pilots and flight attendants rarely get their passports stamped upon admittance to a foreign country. Crews are almost always admitted to international destinations via dedicated employee arrival portals with expedited screening.
Do trains stamp your passport?
You won't get a stamp when crossing internal borders, no matter whether it's train, plane or car. There is simply no one to give it to you. It's equal with crossing border from New York to New Jersey (for example).
Can UK border control see travel history?
Entry and exit into and out of the UK. Your travel history can be provided for the past 5 years if a passport or travel document is submitted for this period.