This is a very interesting approach to playing the UK to prevent Sea Lion! Saving your IPC’s round 1 especially is something that could really throw off Germany/Italy, I really like that idea. That’s something you really only ever see from Germany, maybe Italy so it would be neat to see that thrown back at the Axis.
However, I’d counter that preventing Sea Lion shouldn’t be UK’s only objective for turns 1-3 or 4. Giving up on the Med/Egypt and then especially the Middle East is great way to hand the Axis a victory. In my games lately, the UK player has basically been daring Germany to go Sea Lion to focus on the Med.
Sea Lion really pulls Germany out of position and costs their almost their entire IPCs for turns 1-3. Russia should outnumber Germany on the Eastern Front come turn 4 and can make Germany pay. While the Sea Lion threat really focuses USA to focus Europe, liberating London is easy once the German navy is wiped. I’d suggest working on what you can do as USA/Russia to really hurt Germany for Sea Lion.