We discuss the status of the calibration programme for CanariCam and related initiatives that aim to provide quality calibration facilities for users of the GTC and other telescopes. We have Visible and IR photometry of >300 stars apt for the calibration of CanariCam giving an initial density of ~ 1 star per 100 square degrees of sky. The uncertainties in the visible data are typically ≥ 0.01mags and somewhat better in the near-IR. A revised catalogue of photometry of field stars of 26 AGNs has been produced with 43 000 observations of 437 stars, adding some 5000 additional visible measures. We have collaborated actively in the calibration of IRAC on SIRTF, providing the largest submission of input data received by the IRAC calibration team. Our data quality is excellent, exceeding that of any other submission by a significant factor.