Middlesbrough's casino plans looked doomed last night after the Government said there could be a High Court challenge if it was approved. The scheme - aimed at bringing at least GBP 10m worth of investment and 300 jobs to the town - has been in limbo since a House of Lords vote two months ago. Peers voted down an order to build Britain's only "super-casino" in Manchester, and blocked licences for 16 smaller gambling sites, including in Middlesbrough and Scarborough.