Depends with the agents, they may need a guarantor if you have no credit history here. you said your husband is UK Citizen, has he lived here recently, because that can make the process easier.
If you have your husband'd offer letter just bring a copy too just to show you will have income.
Hard to really say what you need, i have worked with agents who do not ask for a lot of things and its fairly easy and straightforward to rent through them. Then you get some really difficult agents who insist on a decent credit history etc. My general observation has been if the house is good and they can rent it easily, they are can be very difficult. For hard to let houses they tend to be more flexible and will be willing to negotiate on most things.
When you find a place you like some agents may charge you agency fees for around 80+ and you may need 6month deposit + one month rental.