There is one return pod that never made it back to earth. Either human error or a mechanical malfunction, LMG won’t say which, meant it overshot the re-entry window and entered an elliptical orbit around earth. With £3M worth of cargo onboard it was deemed not valuable enough to launch an intercept mission to recover it. There’s no rush anyway - the capsule is stable in that orbit for at least the next 10,000 years.