Dungeons & Dragons HOLLOW WORLD and d&d book- warhammer to sell/ exchange in Northolt, Greater London for sale

Dungeons and Dragons 'Hollow World' campaign set in box. As far as I know the set is missing the Dungeon Master's Sourcebook (128 pages). It doesn't have the top part of the box, the bottom part is glued with celatape on the corners but it is not torn in any way. The box contains -64 pages players book -32 pages adventure book -4 maps The maps are in good state but they are torn along the edges the map had been folded into. I don't think they had been ever used. The books are in good condition I also have 'The classic D&D rules and adventures book', think it's from '94. All this I would like to swap for Warhammer 40k figures, mostly imperial guard and tyranids, could consider other, even fantasy minis. Mostly interested in OOP metal stuff. email me, I could deliver wherever in London. Thanks, Tomasz