text: Even in the absence of external forcing, climate models often exhibit long-term trends that cannot be attributed to natural variability . This so called climate drift arises for various reasons including: perturbations to the climate system on coupling component models together and deficiencies in model physics and numerics.To illustrate this we have focussed on simulated trends over the second half of the 20th century Below depths of 1000 to 2000m, drift dominates over any forced trend in most regions. As such steric sea-level is strongly affected and for some models and regions the sea-level trend direction is reversed.