We'll be in London in mid-May and it seems there will be track maintenance on the London Midland rail line that would take us from Euston Rail Station out to Watford Junction. Normally, this appears to be an 18-min journey on the London Midland line (train, not underground), but with the line closed down, the Tube/bus combo now takes that to nearly 1 1/2 hours. The bus transfer from London is showing 2 hours.

Does anyone else know of any better options or alternatives to get from Kensington/Hyde Park out to Warner Bros or Watford?

Any ideas or help would be greatly appreciated!