TIMS showed Smoke Internal at car 2504 Staff(AMK) checked and confirmed no signs of smoke / fire / b urning smell on exterior or interior of train. Train was esc orted to terminal station. TIMS showed Smoke Internal at car ~~~~~ #2504 No.1 end smoke detector found to be dusty. Cleaned smoke detector and performed function test-ok.    Done by: Saini, Din and Morgan