double glazed window panes

[sjj84]

Is it a diy job to change a pane of glass in a upvc window? Any recommendations for suppliers to the public in Kent?

I've got 5 windows on one side of my conservatory that look straight onto a horrible fence, currently got some film on the glass which was perfect when first done but the last two years of heat have caused it to wrinkle. I was thinking of replacing the glass with obscured panes like in a bathroom. The other option is blinds,but they'll block light out.