Non-ETOPS Enroute Alternates

[longobard]

EU OPS 1.192 states:

En-route alternate (ERA) aerodrome. An adequate aerodrome along the route, which may be required at the planning
stage.


EU OPS 1.245 states:

Maximum distance from an adequate aerodrome for two-engined aeroplanes without an ETOPS approval
(See OPS 1.192)
...60min...one eng inop cruising speed...


EU OPS OPS 1.297 states:

.....Planning minima for a:
destination alternate aerodrome, or
isolated aerodrome, or
3 % ERA aerodrome, or
en-route alternate aerodrome required at the planning stage
An operator shall only select an aerodrome for one of those purposes when the appropriate weather reports or forecasts,
or any combination thereof, indicate that, during a period commencing one hour before and ending one hour
after the estimated time of arrival at the aerodrome, the weather conditions will be at or above the planning minima in
Table 1 below...


my question is:

1)in which cases enroute alternate for non etops flights are required at planning stage (so satisfying wx requiremens of EU OPS 1.297)?

2)in the cases different from 1) the enroute alternate for non etops flights needs only to be adequate?