If other tagged bikes were there and yours was not then it really sounds like your bike was nicked by scrotes, not tfl.
How long was it left unattended?
If bikes are left, tagged, for several months before removal, then you'd expect to see it tagged before it disappeared.
And if they had loads of these tagged bikes in storage, why would they nick yours? Was it a much nicer bike than the others in store? If it was, this reinforces the idea that it has been nicked by a thief rather than the authorities.
If other tagged bikes were there and yours was not then it really sounds like your bike was nicked by scrotes, not tfl.
How long was it left unattended?
If bikes are left, tagged, for several months before removal, then you'd expect to see it tagged before it disappeared.
And if they had loads of these tagged bikes in storage, why would they nick yours? Was it a much nicer bike than the others in store? If it was, this reinforces the idea that it has been nicked by a thief rather than the authorities.