The glass on the inside of the oven door has fell away while i was cleaning it,can not see any way of putting it back on,is it glued on?

You remove the door and then split the inner and outer parts of the door. clean the glass with Easy Off spray, rinse well, polish and put it back together. The videos should help as they all work to a theme.

How to Clean Oven Glass-Inside, Outside, and In Between!

The Happier Homemaker https://thehappierhomemaker.com > Recipes > Cleaning
Aug 24, 2022 - Spray outside glass with vinegar and wipe down with paper towels. · Clean inside of the oven glass with a scouring pad using the "hack" below.

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Taking the door off the oven and lay door on a soft surface so as to prevent scratching ,taking the door apart ( Carefully ), allow for a large work space, lay out your screws, the glass you are trying to reach is an inner glass, so obviously self clean is not going to help. Good luck!

I am afraid that yours is a common problem. The front glass normally has some small brackets glued to the inside face, which then locate into the door frame. The link will take you to a site that sells oven door glue

I am afraid that yours is a common problem. The front glass normally has some small brackets glued to the inside face, which then locate into the door frame.
This is the correct Heat Resistant Adhesive

You will find sets of screws ether on the outside edge of the door OR on the inside panel. You can NOT! use any glue to "seal" the Glass this will make everything smell like the sealant you picked to use. your door was probably used as a resting spot for something heavy and caused the doors skin to be bent OR when you Cleaned the oven with the clean feature it caused the door to warp. Your option is to get a replacement part to fix the problem you can stop by any appliance parts shop and ask them what the best thing to do is and/or buy the part there you can "pull the door" off the hinges by lifting the door straight up at you and take the part to the stop for help and or replacement

You should be able to repair your existing door. Have a look around the perimeter of the door to see if there are any screws, particularly near the handle. You are looking to take the front fascia off the door, so that you can access the inside. Most doors have the front fascia held on by small brackets glued to the back of the glass that clip on to a fixing on the internal door. The top of the fascia is normally held in place by the handle. Once you have the front of the door off you can retrieve the piece of glass that has fallen out. You will almost certainly find that the glass has come away from the adhesive that was used to hold it in place. You will need to clean up the glass and the metal door and re-stick the glass using a high temperature oven door glue

Sometimes the glass is bonded to the door (glued) which may be why you can't see any screws.

It seems as if you are going to need a new grill door complete.

I just fixed this. You have to screw the door handle back on to the glass panel. When you are screwing it back, theres two square black plastic washers with a lip. Make sure the lip is facing up when you have tightly screwed the handle back. When yo rejoin the glass panel with the metal oven door panel, make sure you push tight and the lip of the washers will slot into the metal lip on the outside of the door. You should hear a click, and it'll be back on.

get these instructions and look at door removal

http://rapidshare.com/files/369550394/BellingFormulaMultifunctionDoubleOven.pdf.html

if the glass has come away from the metal inside doror its was originally secured by a silicone sealant/adhesive. Try Toolstation 59104

You Can buy Heat Resistant Glue at Espares.co.uk
Worked for me!