Ground Truro

1 week after the first outbreak at Heathrow Airport in London, the infection has started to spread westwards across the British isles.
The usually quite, peaceful county of Cornwall, had blocked off all roads and bridges across the Tamar river to provent the infection coming across, their only supplies coming from boats from the small channel islands near by, unfortunately these were their downfall when an infected had stowed away in a boat and quickly, the otherwise scerene town of Truro was quickly transformed into a bloodbath.
Can the remaining Truronians 'fend off the unrelentless hoards of the undead?
Maybe the question now is not if they can stave of death, but how long can they postpone it?