Renovering Bad - Minor. Tiles/ plumbing/ updating

Hi, We would like some minor work done in a bathroom. This is something we would do ourselves but considering the open pipes, want to ensure it is done correctly and to specification. We want to do the following: - Remove the washing machine. - Remove and replace shower cabinet (70 x 70cm) with a new one (70 x 80cm). - Re-tile the broken areas in the wall from the original shower cabinet (if needed) and washing machine pipes. We already know which shower cabinet we want to replace. We have also found the original tiles. Any questions, don't hesitate to ask! Ted