Perhaps some of those bleating on here about ruling 2/3 of the planet, continuing to do advantageous trade deals, control of immigration, jobs etc might like to consider the following
1. We lost most of the Empire by 1948, with the independence of the whole of the Indian sub-continent. Most other colonies went by the mid-1960s. The last vestiges went with the abandonment of the Sterling area in 1967 and military departure form east of Suez..
2. We don't control our borders. Well, generally we do. We require all people who enter the country to show their passports - yes we have visa-free entry and right of residence to other EU nationals, but if there are people we specifically want to keep out, we can do so already. The one exception is people travelling from Ireland.
3. Immigration. How, pray, are we to control this without a visa system - putting significant extra costs on border control, administration, visa issuance, work permits, registration, charging for visas (putting tourists off coming here) and so on. We would also need border controls and some sort of visa for people travelling from Ireland - including closing up the land border with Northern Ireland.
4. Movement iof people. Anyone on this board want to work, travel, live abroad, have a holiday home, cheap travel, telecomms and so on - with use of Health care facilities at no cost while there? All possible out of the EU, but a darn sight easier within it.
5. Immigrants take our jobs - no-one can TAKE a job unless someone offers it. So why don't employers offer jobs to our own people. Answers on a postcard, please - off-shoring is part of it, but would that be changed
6. We can do trade deals, we are 5th biggest economy etc. Yep - but we have to sell to people to have the money to buy their stuff. What sort of deal might they want to cut with us, since we have probably irritated them with all our posturing and demands. "Sure, you can have the same deal we offer Chile (or some other smaller trade partner)".
7. We have freedom - yep - freedom to be ignored. Consider Canada, a fine and prosperous country, member of the G8, with pleasant and talented people and abundant other resources - but largely ignored on the world stage.
So let us vote to stay in - and work to build alliances and use our influence to move things forward.