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Well it is sorted! Thank you both so much.
This time I went into Bing and the same problem occurred but then a bx appeared and it said something like 'do you wish to retain.......' or something to that effect. This time I ticked the box 'always open like this' and 'yes' and the next time I searched Bing it let me typeas much as I wanted in the search box and different suggestions appeared as on my laptop - great!
Finally and I had not noticed this before, once I had opened the search bar the little 'magnifier' you mentioned replaced the return key! Wow!
Thanks so much again.