Im planning to travel the middle east, how easy is it to obtain the necessary visas as a UK passport holder?

Im planning a round the world trip which ends in the middle east. Thinking of travelling this area independently maybe some over land. The countries im planning to visit are Yemen, Oman, Egypt, Bahrain, Qatar, Syria, Jordan , Israel.
Is it possible to obtain visas from the relevant airports? Or am I advised to apply here in the Uk before travelling there? I really would like to avoid sending my passport in to all these consulates as they may lose it , therefore delaying my round the world holiday. Please advise best course of action.
Would really appreciate serious answers.

Many thanks in advance

That sounds like fun. Its actually easyer than you would think to obtain a visa (as long as you follow the law) just type in "obtianing a visa to the middle east" in google and you can do a step by step online application it should only take a little while
Have a nice trip ;)