centenary celebrations at the royal albert hall in june .
it 's been a gargantuan undertaking , even by the formidable standards of the women 's institute .
for days on end , two of its members slaved away baking enough cakes to feed 5,000 women attending the wi 's centenary celebrations at the venue in june .
but the wi has now been told it must pay the venue thousands of pounds to serve the cakes .