Just a quick question, hoping someone can help as I need the barrow for today

I had this builders barrow from TP last year. Just got it out now to use (maybe this'll teach me to check it the day before) and it's deflated and hanging off the wheel itself. Theres no inner tube but there is a valve leading me to think it's tubeless (elementary my dear Watson).

Do I need to go to a tyre place to get it put back on and inflated??? I've had a quick go now, but to no avail it's, very tight.
Anyone that can tell me will be very much appreciated.
Regards
Mack
If required the info on the tyre is Hammerlin 2 ply safety wheel
