River Thames carp fishing underwater, Hemp and tiger nut campaign, Part 1

After having some success of using boilies only in my swim, I am looking for ways to keep the carp longer in my swim. So i thought of prebaiting with hemp and tiger-nut. Which on the first day was a success and kept a carp feeding in my swim for just over an hour. At the moment I normally see carp around 8am to 10am so unfortunately cant always fish at these times due to work. My plan is to test different baits to see which ones will keep the carp in my swim. If you would like me to try any baits feel free to comment below.