Depending on how long you stay in UK,it maybe makes sense to buy dazn nfl gamepass.
It's 18 euro for one week, or 45 euro for rest of the season. Seosen ticket might gets cheaper as the season moves on. It was 165 euro at the beginning of the season.
Sure,watching in a pub is much cooler. But if that is the only way to watch the Colts....
Edit: those are prices in Germany. England another currency,so prices may vary. I try to look it up.