It depends on Germany’s AF movements in G1 whether it is a risk or not. If they put massive force forward (in range of UK), then yes, you reduce the size of the UK naval build to JUST the AC, and do that out of range in SZ2. Then you use the remaining 14 IPC for land units.
But if several FIGs are out of range, with an AC/TRN/2 INF build on UK1, you SHOULD be safe from Sea Lion…
Germany has 4 FIGs max in range (1 dead in Ukraine R1, 1 sitting in Libya after G1 that can;t reach UK).
Germany has 1 TRN, so 1 INF/1 ARM is the most that can land in UK
With FOUR FIGs in range, you probably want to skip the TRN and go land units, then build your TRNs the following turn.
UK will land 4 units in Algeria, 1 of those from ECan, so 1 land unit left in UK, plus the 2 INF from the build. The remaining unit would be an ARM for me, sending 2 INF, 1 ART, 1 ARM to Algeria
US sends a FIG and BOM to UK
And with the UK1 build being in SZ2, no need to transfer the RAF FIGs to the AC yet.
So UK has:
2 INF, 1 ARM, 3 FIG, 2 BOM, 1 AA
So if only 3 Germany FIGs are in range…
1 INF, 1 ARM, 3 FIG, 1 BOM vs. 2 INF, 1 ARM, 3 FIG, 2 BOM, AA
Less than 10% Axis win.
The other option of course is for the UK to STACK their fleet in SZ6 on UK1, and invite the Germans to hit it…
The point is, there are several ways to “deal with” the AC build. But if you DON’T build the AC as Germany, you lose the Baltic Fleet on UK1, period.