Floating radio buttons

you should only float <label>, not <input>.
then you should increase the width of "label.sex" for it to be able to fit both input and text on the same line.  using "em" as unit is better to acheive this and support text-size changes.

Here is the code (completely remove the "label,input,textarea" rule set):

label {
     float: left;
     margin-bottom: 10px;
     text-align: right;
     width: 250px;
     padding-right: 20px;
     font-family: Verdana, Arial, Helvetica, sans-serif;
     font-size: 100%;
     color: #FFFFFF;
     background: #000000;
}
label.sex {
     width: 6em;
}

Thanks, but it plays havoc with the rest of the form..

<label for="Name">Name:</label>
<input class="name" name="name" type="text" id="name" size="35" maxlength="50"
                    onchange="validatePresent(this, 'inf_name');">
                    <div class='info' id="inf_name">*</div>
                    <br />

<label for="Town">Town:</label>
<input class="name" name="town" type="text" id="town" size="35" maxlength="50"
                     onchange="validatePresent(this, 'inf_town', true);">
                    <div class='info'  id="inf_town">*</div>
                    <br />      


<label for="County">County/State/Region:</label>
<input class="name" name="county" type="text" id="county" size="35" maxlength="50"
                     onchange="validatePresent(this, 'inf_county', true);">
                    <div class='info'  id="inf_county">*</div>
                    <br />      
                              
<label for="Country">Country:</label>
<select  name="country" size="1" id="country">
      <option selected>United Kingdom</option>
        <option value="Afghanistan">Afghanistan</option>
            <option value="Albania">Albania</option>
            <option value="Algeria">Algeria</option>
            <option value="American Samoa">American Samoa</option>
            <option value="Andorra">Andorra</option>
            <option value="Angola">Angola</option>
            <option value="Anguilla">Anguilla</option>
            <option value="Antigua and Barbuda">Antigua and Barbuda</option>
            <option value="Argentina">Argentina</option>
            <option value="Armenia">Armenia</option>
            
        </select>
<br>                                                            
<label for="Email2">Email Address:</label>
<input class="email" name="email1" type="text" id="email1" size="35" maxlength="50"
                     onchange="validateEmail(this, 'inf_email1', true);">
                    <div  class='info' id="inf_email1">*</div>
                    <br />
                              
<label for="Email2">Re-Enter Email:</label>
<input class="email" name="email2" type="text" id="email2" size="35" maxlength="50"
                     onchange="validateEmail(this, 'inf_email2', true);">
                    <div  class='info' id="inf_email2">*</div>
                    <br />

<br>

<label for="Date of Birth">Date of Birth:</label>            
<script>DateInput('dob', true, 'DD-MON-YYYY')</script>            

<br class="date">

<label>Sex:</label>
<label class="sex">Male:<input name="sex" type="radio" value="male" checked /></label>
<label class="sex">Female:<input name="sex" type="radio" value="female" /></label><br>

<label for="Time">Time of Birth:</label>
<label class="selectm" for="Hour">Hour:</label>
<select name="hour" size="1" id="hour">
        <option value="12" selected>12</option>
            <option value="01">01</option>
            <option value="02">02</option>
            <option value="03">03</option>
            <option value="04">04</option>
            <option value="05">05</option>
            
      </select>

<label class="selectm" for="Minute">Minute:</label>
      <select name="min" size="1" id="min">
            <option selected>00</option>
            <option value="01">01</option>
            <option value="02">02</option>
            <option value="03">03</option>
            <option value="04">04</option>
            
      </select>
<br>
                                                                    
<input class='brk' type="submit" name="submit" value="Continue">
<input class='brk' type="reset" value="Clear Form">