The commanders of both the Royal Navy and Kriegsmarine thought so, no offence but I am going to go with their opinions.
They could not get the air superiority to launch the invasion, ergo Britain defended itself from German invasion.Yeah, so? That doesn´t suddenly make the UK defending operation sea lion.
Not enough? Austria fucking helped them.Sitting on an island after being overrun on mainland europe. True heroes at that time. We couldn´t do much and did not enough.
British troops fought against Nazi Germany, not waved flags at them and cheered.
Due to realising that they could not get air superiority and that the invasion was therefore a dead duck, just as their troops would have been if they had launched an invasion without air and naval superiority.It was postponed prior to the end of the battle of britain.