Cooking pre-assembled lasagne. Please help!

[MissMeg]

Hi ladies, looking for some expert advice..........

Yesterday I made two lasagnes (while DH had his feet up but that's another thread!). Want to cook them tonight but just realised I don't know how and the Internet is full of different advice argh

Each dish is about 30x 25 cm. how long do you think they will take to cook from the fridge? I was thinking an hour at 160 fan and cover with foil???

[cdtaylornats]

I would do it at 180 for 45 minutes with the foil off for the last 15.