EllieForever

Any advice gratefully received! Dash showing 'refill' on my 1998 Elise S1, went to fill up but the key just turns a full 360 in the lock and the cap turns 360 too with the occasionally clicking sound as it goes but won't come out. Fortunately enough fuel to get home but not enough to get to a Lotus specialist to get it fixed. Any suggestions as to what might have broken and how to fix it. I was wondering if the fuel cap housing has broken away from the bodywork and is therefore just turning but that doesn't explain why the key turns fully does it?