Church Lawford Village Hall, on School Street near Rugby, is a long hall that is good on width and height, with a vaulted ceiling. I'm not sure you could fit two castles side by side, but we've had the Junior Disco Run inside before with no issues.
Our first hire here
On our first hire, we positioned the fun run along the left-hand side of the hall, as shown in the image below. It's RPII tested like all our inflatables, and I do the testing myself.

You could definitely fit a couple of inflatables in here depending on sizes and layout. The hall's website says it can be split in half with sliding doors, and it seats 100 at tables.
Getting in and parking
There's parking around the back of the hall, between the building and the play park, with space for around 20 cars. The entrance is next to the car park, where you go through the main doors into the foyer and then into the hall.
To the left is an extra room where the tables and chairs are stored, and to the right is the kitchen.
The only drawback is the limited outside space. However, it's in a lovely village, and there's a good pub opposite if you wanted to go down that route for food or drinks.