When you contact your Council about costs @RubyLeaf, check that the price includes VAT. I also agree with@Fire, there may be more. Two or three visits from a pest controller should solve your problem.
I perhaps would not assume that there is just one rat.
Even if there is only one now … that one will meet a mate … I’ve seen figures stating that a pair of rats can produce over 1,000 offspring in one year … in three years those 1,000 can potentially become around 500,000,000 … 🐀
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
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Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.