140 that is elongate and which includes a base 141 and a mounting surface 142 mounting surface 142 mounts a series of lugs e g lug 144 that attach the flame holder assembly to the trailing edge box 122 fig2 notably the lugs are shown in respective mounted positions in phantom lines in the embodiment of fig3 two types of lugs are used specifically lugs 144 146 are floating lugs and lug 148 is a fixed lug the floating lugs differ from the fixed lug in this embodiment by incorporating recesses e g recesses 145 147 for receiving fasteners whereas the fixed lug incorporates through holes e g holes 149 151 the recesses enable the floating lugs to slide relative to the mounting surface 142 even though movement away from the mounting surface is restricted by fasteners e g rivets 153 155 notably the lugs are fastened to flange portions e g portions 157 159 that extend from the mounting surface 142 as shown in greater detail in fig4 and 5 floating lug 144 includes a body 160 with legs 162 and 164 extending from the body the body incorporates a housing 166 that defines an interior cavity 168 one or.