Like everyone has said get a couple of traps. The ones above that Barrychuckle have allow you to dispose of the rodent without having to touch it. They’re very good.
There must be something in the air as we had one under our bedroom floor a few weeks ago. Only one and lord knows how it got there. I had to cut the floorboards to get the trap set up, it was a right faff!
Biscoff and peanut butter was my bait of choice and it worked after about 8 hours. Our old Jack Russells were good ratters but our latest addition wasn’t remotely interested although she loves to sniff them out when we’re in the fields etc.