LVL BBC Model B
This is its ROM expansion board, with battery backup, a link jumper of unknown function, two 8K RAM chips, some logic chips, and three extra ROM sockets, containing a Watford Electronics ROM - possibly Word-Aid, as next to it is Wordwise Plus 2, and Disc Doctor. There isn't actually a DFS ROM for the LVL DOS board, as the only ROMs on the main board were OS and BASIC.