The B-52 can fly in almost any weather, and with it carrying Nuclear weapons it can serve as a very effective deterrant. It can also be used as a low level bomber, hard to believe with its size. You'll always find it on the front line, firing cruises and flattening areas. It's the work horse, and it will be for years to come.
I was talking of Matinence of the air frame because of fatigue and cracking, when that happens it cost a lot to replace. And it happens more on older planes. They will also be doing full matinence checks more often on the older aircraft, taking the engines out, checking the air frame...checking everything basically.
The SAS can work with other British trained forces, like in Sierra Leone they worked effectively with the Paras, but rarely they work with others. British special forces working with American is a big no-no, they are so different it would be dangerous to mix them. An example, the Navy Seals when under heavy fire are trained to shoot and retreat, the SAS are trained to shoot and move forward.
The SAS are the superior force in the world, no one can match them. They have experience in every type of combat, and all of their operations show their effectiveness.