Burner Phone Clue 2

The TravelJunkies comment shows Roman numerals that have been carved into the Burning Stones.
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When viewed in conjunction with the Little Witchell map & key, the numerals can locate the new location for the criminals' operation.
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The password for newlocation.littlewitchell.co.uk is the initials of the new location, in all uppercase.
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You know that the password is one of these:
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The Witchell Inn - TWI
The Burning Stones - TBS
The Purser Farmhouse - TPF
SmartSavers - SS
All Saints Church - ASC
Witchell Cemetery - WC
Little Witchell Community Centre - LWCC
Little Witchell Library - LWL
Your home - YH