HORNBY TRACK EXTENSION PACK FExtend your set in easy steps by adding Track Packs and TrakMat Accessory Packs all the way to the full layout pictured on your TrakMat scenic underlay sheet. Add Extension Pack F to the Starter Oval plus Extension Packs A, B, C, D and E to achieve the full TrakMat layout. Complete the scene with TrakMat Accessory Building Packs and Hornby landscaping details.