Back home now.
The hotel moved us to another room, gave us another night as a complimentary stay and also a full refund for the night I'd paid for. Our breakfasts and dinners were wiped off the bill, as was the minibar, room snacks etc. They are also going to be inviting us back for another free stay.
Regarding the little critters, the housekeeping manager gave me an update as we were checking out and she was arranging the refund:
They got the pest people in on the Saturday. They took the headboard off the wall and opened the power outlets looking for them. After taking apart the bed base a small colony of a dozen or so were found (I'd already caught one for them in a glass

) in a corner. The bed base was disposed of as was the bedding. The room was 'fogged' and the rooms above, below and either side were searched too. The room will remain sealed for a month, in a fortnight the pest controller will come back and fog again.
As for our own stuff:
We bagged up all our stuff in bin bags, gf's little carry on suitcase went in a bin bag which was tied up, as was my rucksack. Our leather jackets went into a bin bag and got tied up, I'll take the jackets to the cleaners and the hotel has agreed to reimburse us.
On the way home I bought an insecticide kit from a pet shop, there were only 2 products which specifically said they kill bed bugs and I bought a kit which consists of 2 foggers, some powder and a spray. When we got home, before we entered the house, I put 2 poles across the inside of the garage roof, hung all our clothes up and also used a stepladder to hang all our undies and shoes from. All the empty bin bags went in another bag and were binned. The suitcase and rucksack were sprayed all over with the insecticide spray, getting it right into the seams and zips which is where the bed bugs hide, apparently. These were then also hung up from the roof.
Both the foggers where then set out below the hanging items and lit, the garage was then shut and left for about four hours (the instructions say minimum 2 hours). Before I completely shut the up-and-over door I knelt and had a little spy, all the clothes were completely enveloped in a foul smelling grey smoke.
Before entering the house I sprayed the insecticide all over my shoes, which remain in the porch. The clothes I'd changed into back at the hotel could all survive a hot wash, so I undressed in the kitchen and they went straight into the washing machine. The floor was then wiped over.
When the garage was later opened all the smoke was gone, but the clothes stank with an acrid chemical smell. These then went straight into the washing machine. The suitcase and rucksack are still damp with insecticide and remain in the garage drying out.
So although it cannot be guaranteed that I've not infected the house, we've had a good go at stopping them from getting in. Time will tell!