Joe, I normally agree with what you post, but this is just not right (unless you mean it could be argued and lost!).
A "normal place of work" is a concept that exists only within a Revenue statement of practice for the operation of a concession allowing tax free reimbursement.
The statutory test that underpins this concession is the question of whether the holder of an employment is obliged to incur the cost of a specific journey in the performance of the duties.
If an employer permanently relocates then by definition the normal place of work changes, as does the employment contract between the parties (whether written or implied). The employee will never be required to work at that old location again.
Depending on where people live relative to the new and old locations, the cost to some of commuting may reduce and the cost to others may rise. But regardless, the cost to all is still a cost of getting to work, not a cost of travelling while working.