LONDON : Formula One may have to wait a decade for a return to screaming V10 or V8 engines and jettisoning the next generation V6 due to be introduced next year is simply not feasible, according to F1's former chief technical officer Pat Symonds. The Briton, now executive engineering consultant for the Cadillac team due to debut next year, told Reuters any talk of potentially continuing with the current turbo hybrid beyond 2025 was a non-starter. Formula One has been considering various