The apparatus 1, wherein said biasing means each comprise at least one torsion spring for biasing {HEAD ~ the respective attached flap} outwardly into {TAIL ~ its extended position} 
outwardly into
The apparatus 1 , wherein said biasing means each comprise at least one torsion spring for biasing { HEAD ~ the respective attached flap } outwardly into { TAIL ~ its extended position }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL