Afraid not. It was in the national press a few years back after he clamped Betty Boothroyd. Have a Google for "clamper Haworth Boothroyd" or something similar.
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It seems he also has stooges giving people tickets valid until midnight, then clamping them because the tickets are not transferable.
The fact is that it is a civil contract, he can legally only claim his losses if the parker is in breach of the contract and he cannot impose penalty charges. I'd have thought by now that some enterprising person could have established a no-win, no-fee litigation service taking batches of these frauds through the county court for a small fee.