The first part of Hohlaubgrat (Red) may be climbed straight up, but there are tracks that goes right and the left.
Hohlaubgrat: PD + , rock climbing (II) 30 m under the summit (equiped), snow up to 35° - 1000 m level difference from Britania Hut.

For Strahlhorn normal route(Blue): be sure that you know where to leave the Hohlaubgrat route- may be difficult to find during the night/early morning.
...next Topo of Strahlhorn Normal Route here...


...another Topo of Strahlhorn Normal Route and Allalinhorn Hohlaubgrat here...