I would go with the live frog idea....They are usually easy to find and catch on location....
Many gravel pits around London have stocked bass in them as well and they seem to love live bait....I personally go after them with a fly rod patterning the food they eat....Mice,frogs,dragon flies,small snakes ect.....Gosslings and birds are a little harder to tie so I don't bother with those patterns