I have a mouse on my rented room. Need advice on how to kill it?

So I pay for a rented room in London. I can t afford to move out and get another place. I ve lived here for 7 months and this is the firdt time I ve ever had a problem. The landlord got s pest control person but all he did was place rubbish boxes with poison in them and it doesn t seem to be working. Whst can I... show more So I pay for a rented room in London. I can t afford to move out and get another place.
I ve lived here for 7 months and this is the firdt time I ve ever had a problem. The landlord got s pest control person but all he did was place rubbish boxes with poison in them and it doesn t seem to be working. Whst can I do or buy? ( UK stores only ) ad I can buy them instantly and set hem up. Unless anyone else has a different solution.
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