Glass panes (Horwich BL6)

I have 3 identical panes of glass, all marked BS6206 AT KM 7058. The AT means it’s tempered/safety glass. The panes all have rounded edges. They are 18” (almost 46cm) by 11and 3/8” (almost 29cm) and I’d say about 1/8” thick. Does anyone have a use for them, maybe as part of a set-up where you put plants under glass?