I can provide multiple people to complete this task within the 3 days (our aim would be to complete faster) this is based on the understanding that you are looking for weeding, lawn mowing and the trimming of your edges. There are no sizing details mentioned here, but that would dictate how many people we include.
I am from Wisbech so local to yourself and I am very creative with gardening experience passed down from my mother. I know how to mow the lawn, pull out weeds and trim hedges so if you have the equipment I can do it.