The nearside is close to the house wall.

I got out of the driver's door.

Now resolved.

Thanks to all those here who tried to help.

Working alone I raised the rear of the Micra, one side at a time, using a 2x3x90 inch piece of wood as a lever combined with several bricks and much smaller pieces of wood. When raised I put a 17 inch square piece of hardboard, rough side down, with a piece of polythene on top under each wheel. With bricks as spacers I used the piece of wood to lever the nearside rear wheel well away from the wall.

When in the car I was able to pull the bonnet release with sufficient force to open the bonnet. The driver's door would still not open at this stage so I assume it was deadlocked - I will investigate this further later.

I had already charged the battery with a very old Netgear 12 volt DC power supply. Not recommended to anybody without sufficient electrical experience. This power supply had an open circuit voltage considerably higher than 12 volts. Charging progress was monitored with a digital multimeter.

The Micra now appears to work OK.

I must remember not to park so close to walls especially without the car being used for several weeks. I am not sure if the inside light was left on but I will check this more carefully in future.

I don't like leaving the bonnet unlatched even with the battery removed - perhaps I will investigate an emergency way of opening it from outside of the car. An emergency 12 volt input point outside of the car may also have its uses.