Relay positions are numbered from the top left on the upper, supplementary, panel: top row 1-6, bottom row 7-13.
Position 8 - Terminal 30 voltage supply relay (109)
The panel below that is the main relay panel with positions 1-4 left to right, and the big wash/wipe relay on the far right in positions V and VI (No idea why they are labelled with roman numerals)
1 - Dual tone horn relay (53)
2 - X contact relief relay (100)
4 - Glow plug relay (103)
V/VI - wash/wipe system: without rain sensor, without headlight washer system (377)
The number on the relay can is a code which identifies what the relays functionality is, so you may find another 53 relay in position 10 as a fuel pump relay on PD cars, or in position 13 as a radiator fan relay.