Well done penny!!  think half pound is brilliant especially over Christmas, I don't think I will have lost anything this week after a loss last week, it really does seem to be falling into a pattern like that now..  Lose a couple of weeks then stall for a week then lose again!! 
Hi margo, I'm also from the same area as penny.  I wouldn't worry about not losing any weight so early out.  It is quite usual to stall for a week or too, but you will start losing again, and whilst you are not losing actual pounds you are probably losing inches, so a good idea to take your measurements and keep checking up on them.   But penny has more knowledge than I so will be able to advise you much better, but good luck xx