The co-ordinates do not take you to Pennsylvenia Avenue, but to a location which could help to clarify where 'U''R'.
The different stages of the cache may help indentify some of its former inhabitants. The final cache is a micro located at:
| Stage 1 - Pictured burning (The younger) |
N 54 27.524 W 005 50.239 |
AB = |
| Stage 2 - Swap an 'i' for a 'y' |
N 54 27.304 W 005 50.537 |
CD = |
| Stage 3 - Owns a lot round here |
N 54 27.618 W 005 49.985 |
E = |
| Stage 4 - Whose gardens are these? |
N 54 27.637 W 005 49.673 |
FG= |
| Check Sum |
AB+CD+E+FG |
= 114 |
Good Luck!